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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20180605T083000
DTEND;TZID=Europe/Berlin:20180612T100000
DTSTAMP:20180605T112959Z
CREATED:20180322T123945Z
LAST-MODIFIED:20180605T112959Z
UID:1911-1528187400-1528797600@alop.uni-trier.de
SUMMARY:Short Course on Parallel Optimization Methods for Time Dependent Problems
DESCRIPTION:Prof. Matthias Heinkenschloss with the Department of Computational and Applied Mathematics\, Rice University in Houston\, Texas is offering a short course on Parallel Optimization Methods for Time Dependent Problems at Trier University on behalf of the Research Training Group on Algorithmic Optimization.  \nThe course will consist of three lectures\, with the tentative lecture schedule to follow soon. \nThe lectures will take place on the following dates and times: \nTuesday\, June 5\, 2018 at 8:30 c.t. in HS 10 \nThursday\, June 7\, 2018 at 8:30 c.t. in HS 9 \nTuesday\, June 12\, 2018 at 8:30 c.t. in HS10 \nPlease refer back to this page for more information as it becomes available. \n 
URL:https://alop.uni-trier.de/event/short-course-on-parallel-optimization-methods-for-time-dependent-problems/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Short Course
ORGANIZER;CN="Research Training Group ALOP at Trier University":MAILTO:OptimizationDays@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20180628T160000
DTEND;TZID=Europe/Berlin:20180628T173000
DTSTAMP:20180613T131257Z
CREATED:20180612T062200Z
LAST-MODIFIED:20180613T131257Z
UID:2165-1530201600-1530207000@alop.uni-trier.de
SUMMARY:ALOP-Colloquium with Mehiddin Al-Baali
DESCRIPTION:On Thursday\, June 28\, 2018\, at 16:00 c.t. Prof. Mehiddin Al-Baali\, Department of Mathematics and Statistics\, Sultan Qaboos University\, Muscat\, Oman will present his recent work entitled  \nOn the Damped Technique\, Self-Scaling and their Combination when Introduced to the Broyden Family of Methods for Unconstrained Optimization \nRecently\, we have extended the damped-technique in the modified BFGS method of Powell for constrained optimization to the Broyden family of quasi-Newton methods for unconstrained optimization. Appropriate choices for the damped parameter will be suggested to improve the performance of a restricted class of quasi-Newton methods and enforce convergence of many divergent methods. These properties will be illustrated when applied to a simple quadratic function as well as to a set of standard test problems. It will be shown that the proposed damped choices improve the performance of most quasi-Newton methods substantially (or significantly) in several cases. We will also illustrate the useful features of the self-scaling technique for quasi-Newton methods  and its combination with the above damped technique.  \n. \nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/alop-colloquium-with-mehiddin-al-baali/
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20180716T080000
DTEND;TZID=Europe/Berlin:20180720T170000
DTSTAMP:20180615T122957Z
CREATED:20171018T130200Z
LAST-MODIFIED:20180615T122957Z
UID:1525-1531728000-1532106000@alop.uni-trier.de
SUMMARY:Women in Shape (WiSh) - a Collaborative Research Workshop
DESCRIPTION:The Collaborative Research Workshop Women in Shape -3 (WiSh): Modeling Objects in 2D and 3D will take place in Trier\, Germany from 16 July through 20 July\, 2018.   \nUnlike the traditional workshop format\, the focus of WiSh is to carry out a few designated research projects that will be initiated during the workshop and lead to a viable collaboration among the participants. \nParticipants: \nWe welcome applications from women researchers at various stages in their careers (from graduate student to senior researcher) from all over the world to foster research collaboration and mentorship. \nProjects: \nParticipants will spend one week working together in small groups to solve open questions in shape modeling. Potential topics may include shape optimization\, understanding shape complexity from multiple perspectives\, generating discrete formulations of variational problems and optimizing solutions\, and developing flexible\, robust\, and compact 2D and 3D shape representations. \nPlease click here for a list of the group topics and abstracts:  WiSh3_GroupProjects \nStructure: \nWiSh participants will begin generating new results in collaboration with other participants. Results form the workshop and related work may be submitted for consideration for publication in the Springer AWM Proceedings series. \nWorkshop Language: \nEnglish \nOrganizers: \nKathryn Leonard\, Occidental College (contact for applicants from America and Australia) \nGéraldine Morin\, University of Toulouse \nKathrin Welker\, Trier University (host) \n  \nA copy of the WiSh workshop program may be downloaded here \nRegistration:\n \nRegistration is now closed. \n  \nHotel: \nA contingent of single rooms and double rooms has been reserved at the Robert-Schuman-Haus in Trier\, the location of this year’s workshop.  You may reserve a room by contacting the location directly via e-mail or phone mentioning the keywork “WiSh” any time prior to May 4\, 2018. \nSchedule\, location\, and directions: \nThe workshop is scheduled to begin on Monday\, July 16 2018.  Participants are encouraged to arrive on Sunday\, July 15\, 2018. \nThe workshop will conclude on Friday\, July 20\, 2018. \nThe workshop will take place at the Robert-Schuman-Haus in Trier. \nCheck here for directions on how to get to Trier. \nPartially supported by NSF-HRD 1500481 – AWM ADVANCE  grant
URL:https://alop.uni-trier.de/event/women-in-shape-wish-a-collaborative-research-workshop/
LOCATION:Robert-Schuman-Haus\, Auf der Jüngt 1\, Trier\, Rhineland-Palatinate\, 54293\, Germany
CATEGORIES:Workshop
ORGANIZER;CN="Research Training Group ALOP at Trier University":MAILTO:OptimizationDays@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20180801T120000
DTEND;TZID=Europe/Berlin:20180801T140000
DTSTAMP:20180514T142457Z
CREATED:20180509T134417Z
LAST-MODIFIED:20180514T142457Z
UID:2018-1533124800-1533132000@alop.uni-trier.de
SUMMARY:Presentation by Dr. Christina Schenk of Carnegie Mellon University
DESCRIPTION:Dr. Christina Schenk\, an ALOP Alumni and current post doctoral fellow at Carnegie Mellon University\, will join us for research collaboration and speak during our research seminar on August 1\, 2018 on the following topic: \nParameter Estimation for Pharmaceutical Processes – Advancements and Case Studies \nAbstract: \nThe development of drug manufacturing processes involves dealing with spectroscopic data. When dealing with\n spectroscopic data\, the identification of parameters and variances still remains a challenging task. In many cases\n kinetic parameter identification from spectroscopic data has to be performed without knowing the absorbing\n species in advance\, such that they have to be estimated as well. However\, kinetic parameter estimation is\n important in order to lower production costs\, i.e. save measurements and equipment. Furthermore\, scaling up\n from laboratory to industrial level relies on accurate kinetic parameter values.\n That is why\, we take a closer look at the development of optimization-based procedures in order to estimate the\n variances of the noise in the system variables and spectral measurements. Then\, with the estimated variances\n we determine the concentration profiles and kinetic parameters simultaneously using adequate strategies. The\n work is based on the approach proposed by Chen et al. (2016) using maximum likelihood principles for simultaneous\n estimation of reaction kinetics and curve resolution from process and spectral data. For this a new\n software environment was developed which is continuously enhanced. These investigations and advancements\n are presented within this talk and illustrated by several case studies of pharmaceutical processes. \nJoint work with Lorenz T. Biegler (Carnegie Mellon University)\, Lu Han (Pfizer Inc.) and Jason Mustakis (Pfizer Inc.) \nReferences\n W. Chen\, L. Biegler\, and S. Muñoz. An approach for simultaneous estimation of reaction kinetics and curve resolution\n from process and spectral data. Journal of Chemometrics\, 30:506–522\, 2016. doi: 10.1002/cem.2808.\n URL http://dx.doi.org/10.1002/cem.2808. \n 
URL:https://alop.uni-trier.de/event/presentation-by-dr-christina-schenk-of-carnegie-mellon-university/
CATEGORIES:Scientific Research Collaboration
ORGANIZER;CN="Research Training Group ALOP at Trier University":MAILTO:OptimizationDays@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20180813
DTEND;VALUE=DATE:20180817
DTSTAMP:20180720T122054Z
CREATED:20180322T145011Z
LAST-MODIFIED:20180720T122054Z
UID:1915-1534118400-1534463999@alop.uni-trier.de
SUMMARY:Summer School 2018 - Mixed Integer Nonlinear Programming
DESCRIPTION:The Research Training Group on Algorithmic Optimization proudly announces its third annual Summer/Autumn School from August 13-16\, 2018. This year’s focus will be on Mixed Integer Non-Linear Programming. \n  \nConfirmed speakers are: \nOliver Bastert & Zsolt Csimadia (FICO\, Xpress Optimization) \nChristoph Buchheim (TU Dortmund) \nSven Leyffer (Argonne National Labratory) \nJeff Linderoth (University of Wisconsin-Madison) \n  \nOrganizers:  \n \nUlf Friedrich\, Volker Schulz\, Sven de Vries  \nYou may download a preliminary schedule here \nPlease find all the details at alop.uni-trier.de/MINLP
URL:https://alop.uni-trier.de/event/autumn-school-2018-mixed-integer-non-linear-programming/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Workshop
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20180910
DTEND;VALUE=DATE:20180913
DTSTAMP:20180322T151903Z
CREATED:20180322T151811Z
LAST-MODIFIED:20180322T151903Z
UID:1926-1536537600-1536796799@alop.uni-trier.de
SUMMARY:EUCCO 2018 - 5th European Conference on Computational Optimization
DESCRIPTION:Registration for EUCCO 2018 is now open. Please refer to the detailed registration information located on the website.
URL:https://alop.uni-trier.de/event/eucco-2018-5th-european-conference-on-computational-optimization/
CATEGORIES:Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20181004T130000
DTEND;TZID=Europe/Berlin:20181006T110000
DTSTAMP:20210323T075203Z
CREATED:20180604T122236Z
LAST-MODIFIED:20210323T075203Z
UID:2132-1538658000-1538823600@alop.uni-trier.de
SUMMARY:Optimization Days - Math Workshop for Female Master Students
DESCRIPTION:Optimization Days – a Math Workshop for Female Master Students will take place in Trier\, Germany from 4 October through 6 October\, 2018.   \nGetting ready to cross the finish line? This workshop will support you in your final steps with courses on “How to write a Mathematical Thesis” by Prof. Dr. Mirjam Dür and “Presenting yourself in Public” by actress Barbara Ullmann. In addition\, you will have  a chance to meet with local PhD students to discuss your field of interest and collaborate on your research. \nParticipants: \nWe welcome applications from female students currently pursuing a master degree in mathematics. \nSchedule: \nThe workshop is scheduled to begin on Thursday\, October 4\, 2018 in the afternoon and conclude on Saturday\, October 6\, 2018 in the morning. \nPlease check back for more details as they are finalized. \nWorkshop Language: \nEnglish \nOrganizers: \nProf. Dr. Mirjam Dür\, Universität Augsburg \nSvenja Kohnemann\, Universität Trier (local host and contact person) \nRTG Algorithmic Optimization (ALOP) \nRegistration is now closed. \nThe reference and graduation information is needed to confirm your eligibility as a master student in the field of mathematics. \nRegistration Deadline:  August 13\, 2018  extended to September 15\, 2018\n \nUpon completion of the registration form\, participants will be eligible to receive a stipend.  Letters of invitation to attend the workshop and confirming eligibility will be sent via e-mail no later than September 20\, 2018. Should you need an invitation prior to that time\, please let us know. \nRegistration Fee: \n35 € \nAn invoice for the registration fee will be forwarded via e-mail on or about September 5\, 2018. Please follow the instructions for payment contained therein. \nHotel: \nParticipants will be staying at the  conference hotel (exact name and location to be announced).  We will make the reservations on your behalf. Please advise us of any special accomodation requirements. \nSchedule\, location\, and directions: \nThe workshop is scheduled to begin on Thursday\, October 4\, 2018 in the afternoon.  \nThe workshop will conclude on Saturday\, October 6\, 2018 in the morning. \nThe workshop will take place at Trier University on Campus I in Building E. \nCheck here for directions on how to get to Trier.
URL:https://alop.uni-trier.de/event/optimization-days
CATEGORIES:Workshop
ORGANIZER;CN="Research Training Group ALOP at Trier University":MAILTO:OptimizationDays@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20181029T160000
DTEND;TZID=Europe/Berlin:20181029T180000
DTSTAMP:20180918T115204Z
CREATED:20180822T062333Z
LAST-MODIFIED:20180918T115204Z
UID:2451-1540828800-1540836000@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Arie M.C.A. Koster
DESCRIPTION:On Monday\, October 29\, 2018 at 16:00 c.t. Prof. Dr. Ir. Arie M.C. A. Koster  of RWTH Aachen will present his recent work entitled \nRobust Combinatorial Optimization – New Problems and Solutions \nAbstract: \nThe growing need to deal with uncertainties in optimization processes has lead to many new research directions. In robust optimization\, an uncertainty set has to be defined containing all scenarios to be considered. Availability of historical data often suggests the use of a discrete or polyhedral uncertainty set. By this\, new combinatorial optimization problems are evolved. \nIn this talk\, we discuss a few examples of novel combinatorial optimization problems inspired by uncertainties in network design and production planning. Further\, this talk should motivate research on the additional complexity introduced by uncertainties. \n  \nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/alop-colloquium-with-arie-m-c-a-koster/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20181126T160000
DTEND;TZID=Europe/Berlin:20181126T180000
DTSTAMP:20181113T084204Z
CREATED:20181113T084204Z
LAST-MODIFIED:20181113T084204Z
UID:2605-1543248000-1543255200@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Caroline Geiersbach
DESCRIPTION:On Monday\, November 26\, 2018 at 16:00 c.t.  Caroline Geiersbach of Universität Wien will present her recent work entitled \n  \nStochastic Approximation for Shape Optimization \n  \n  \nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/alop-colloquium-with-caroline-geiersbach/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20181203T160000
DTEND;TZID=Europe/Berlin:20181203T180000
DTSTAMP:20181115T145928Z
CREATED:20180822T062947Z
LAST-MODIFIED:20181115T145928Z
UID:2456-1543852800-1543860000@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Frank Vallentin
DESCRIPTION:On Monday\, December 3\, 2018 at 16:00 c.t. Prof. Dr. Frank Vallentin of Universität Köln will present his recent work entitled “Chromatic numbers of geometric graphs” \n\nAbstract: \nA classical problem in discrete geometry (due to Hadwiger and Nelson) is to find the minimal number of colors one needs to color all points in the Euclidean plane so that no two points which are distance 1 apart receive the same color. Similar geometric coloring problems can be posed in the context of the hyperbolic plane\, n-dimensional Euclidean spaces\, n-dimensional spheres\, or coloring the Voronoi tessellation of n-dimensional lattices. In this talk I will present a theoretical framework in which all these geometric coloring problems (assuming that the color classes are measurable sets) can be conveniently studied with the help of harmonic analysis and convex optimization. \n\nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10. \n\n  \n 
URL:https://alop.uni-trier.de/event/alop-colloquium-with-frank-vallentin-2/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20181206T160000
DTEND;TZID=Europe/Berlin:20181206T180000
DTSTAMP:20181112T092237Z
CREATED:20181017T105259Z
LAST-MODIFIED:20181112T092237Z
UID:2586-1544112000-1544119200@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Ingenuin Gasser
DESCRIPTION:On Thursday\, December 6\, 2018 at 16:00 c.t.  Prof. Gasser of Universität Hamburg will present his recent work entitled  \n  \nModelling\, simulation and optimisation of power plants based on renewable energies \n  \nAbstract: \nIn this seminar we discuss the fluid dynamics of  parabolic trough\, solar updraft towers\, energy towers and osmotic power stations.  The main issue is to discuss simple fluid dynamic models which on one hand describe the main features of the mentioned applications and on the other allow for robust and fast numerical simulations and optimization.  \nThis is used for different types of power plants based on renewable energy. In all cases we are able to model\, simulate and optimize both in the planning and in the operational phase. \n  \nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/alop-colloquium-with-ingenuin-gasser-of-universitat-hamburg/
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190128T160000
DTEND;TZID=Europe/Berlin:20190128T180000
DTSTAMP:20181217T140622Z
CREATED:20181214T103232Z
LAST-MODIFIED:20181217T140622Z
UID:2628-1548691200-1548698400@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Martin Gugat\, FAU Erlangen
DESCRIPTION:On Monday\, January 28\, 2019 at 16:00 c.t.  Prof. Dr. Martin Gugat of FAU Erlangen will present his recent work entitled \n  \nOn the limits of boundary stabilizability for networks of strings. \n  \nAbstract: \nAn example by Bastin and Coron illustrates that theboundary stabilization of 1-d hyperbolic systemswith certain source terms is only possible if the lengthof the space interval is sufficiently small. We show that simlar phenomena also occur fornetworks of vibrating strings that are governedby the wave equation with a certain source term.It turns out that for a tree of strings withNeumann velocity feedback control at some boundary  nodesfor sufficiently large lengths of the strings\,boundary feedback stabilization is not possible.However\, if the number of strings in the tree is sufficiently large\, also for arbitrarily short strings for certainparameters in the source term stabilization is not possible. \n  \nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/colloquium-with-martin-gugat-fau-erlangen/
LOCATION:Trier University\, E Building\, Universitätsring 15\, Trier\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190321T090000
DTEND;TZID=Europe/Berlin:20190321T103000
DTSTAMP:20190307T125738Z
CREATED:20190307T125738Z
LAST-MODIFIED:20190307T125738Z
UID:2719-1553158800-1553164200@alop.uni-trier.de
SUMMARY:Presentation by Bernhard Werner\, TU München
DESCRIPTION:Dr. Bernhard Werner\, TU München will visit Trier University and speak on the following topic: \n  \nStrichbasierte Handschriftenerkennung: Theorie und Anwendung \nAbtract: \nDer Vortrag beschreibt Grundlagen der Analyse von Symbolen\, die auf einen Touchscreen geschrieben wurden. Diese werden durch Striche modelliert\, die die Fingerbewegung des Nutzers aufzeichnen. Es werden Methoden vorgestellt\, wie diese Striche deformiert werden können ohne ihre Bedeutung zu verändern\, wie ihre Eigenschaften analysiert werden können und wie ihre Form mathematisch sauber beschrieben werden kann. Alle Ansätze sind motiviert durch eine konkrete Umsetzung in einer interaktiven Lernsoftware. \n  \nPlease join us for this presentation on Thursday\, March 21\, 2019 at 9:00 c.t. in E 51.
URL:https://alop.uni-trier.de/event/presentation-by-bernhard-werner-tu-munchen/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Presentation
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190415T100000
DTEND;TZID=Europe/Berlin:20190527T120000
DTSTAMP:20190509T125908Z
CREATED:20190509T125658Z
LAST-MODIFIED:20190509T125908Z
UID:2795-1555322400-1558958400@alop.uni-trier.de
SUMMARY:Short Course on Hilbert Space Methods
DESCRIPTION:Prof. Leonard Frerick  is offering a short course on Hilbert Space Methods at Trier University on behalf of the Research Training Group on Algorithmic Optimization.  \nThe course will consist of sevenlectures\, with the tentative lecture schedule to follow soon. \nEach lecture will take place on \n Mondays\, April 15 to May 27\, 2019\, from 10:00 – 12:00 c.t. in E 52 \nFor a short description please refer to the attached document here. \nPlease refer back to this page for more information as it becomes available.
URL:https://alop.uni-trier.de/event/short-course-on-hilbert-space-methods/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190429T160000
DTEND;TZID=Europe/Berlin:20190429T180000
DTSTAMP:20190205T150750Z
CREATED:20181217T141113Z
LAST-MODIFIED:20190205T150750Z
UID:2634-1556553600-1556560800@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Florian Jarre\, Universität Düsseldorf
DESCRIPTION:On Monday\, April 29 2019 at 16:00 c.t. Prof. Florian Jarre  of  Universität Düsseldorf will present his recent work. \nStochastic gradient descent und Block coordinate descent —\neine Einführung in die Theorie und die praktische Anwendung  \n  \nDer Vortrag befasst sich mit extrem hoch-dimensionalen speziell strukturierten Minimierungsproblemen\, für die selbst die Auswertung eines einzelnen Funktionswertes oft so viel Rechenzeit beansprucht\, dass neue iterative Verfahren zum Einsatz kommen\, bei denen die einzelnen Iterationen billiger sind als eine Funktionsauswertung. \nNatürlich kann man keine Beweise rascher Konvergenz erwarten\, wenn nicht einmal Funktionsauswertungen vorgenommen werden können.  In diesem Vortrag zeigen wir aber einen einfachen Beweis der Konvergenz der Erwartungswerte bei Stochastic gradient descent und  Block coordinate descent – Verfahren\, zeigen die Zusammenhänge zwischen den beiden Ansätzen auf und besprechen mögliche Modifizierungen für praktische Implementierungen. \n  \nThe presentation will take place in HS 9. \n  \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/alop-colloquium-with-florian-jarre/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190506T160000
DTEND;TZID=Europe/Berlin:20190506T173000
DTSTAMP:20190425T151748Z
CREATED:20190410T084902Z
LAST-MODIFIED:20190425T151748Z
UID:2764-1557158400-1557163800@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Christian Meyer\, TU Dortmund
DESCRIPTION:On Monday\, May 6 2019 at 16:00 c.t. Prof. Dr. Christian Meyer of TU Dortmund will present his recent work entitled \nOptimal control of a non-smooth semi-linear elliptic equation \n  \nThe presentation will take place in HS 9. \n  \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/alop-kolloquium-with-christian-meyer-tu-dortmund/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190528T083000
DTEND;TZID=Europe/Berlin:20190606T100000
DTSTAMP:20190520T060711Z
CREATED:20190509T124822Z
LAST-MODIFIED:20190520T060711Z
UID:2789-1559032200-1559815200@alop.uni-trier.de
SUMMARY:Short Course on Decomposition Based Methods for PDE Constrained Optimization
DESCRIPTION:Prof. Matthias Heinkenschloss with the Department of Computational and Applied Mathematics\, Rice University in Houston\, Texas is offering a short course on Decomposition Based Methods for PDE Constrained Optimization at Trier University on behalf of the Research Training Group on Algorithmic Optimization.  \nThe course will consist of three lectures\, with the tentative lecture schedule to follow soon. \nThe lectures will take place on the following dates and times: \nTuesday\, May 28\, 2019 at 8:30 in HS 9 \nTuesday\, June 4\, 2019 at 8:30 in HS 9\n \nThursday\, June 6\, 2019 at 8:30 c.t. in E 52\n \nFor a short description please refer to the attached document here. \nPlease refer back to this page for more information as it becomes available. \n 
URL:https://alop.uni-trier.de/event/2789/
LOCATION:Trier University\, E Building\, Universitätsring 15\, Trier\, Germany
CATEGORIES:Short Course
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190617T160000
DTEND;TZID=Europe/Berlin:20190617T173000
DTSTAMP:20190523T144201Z
CREATED:20190410T091014Z
LAST-MODIFIED:20190523T144201Z
UID:2766-1560787200-1560792600@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Barbara Kaltenbacher\, Universität Klagenfurt
DESCRIPTION:On Monday\, June 17 2019 at 16:00 c.t. Prof. Dipl.-Ing. Dr. Barbara Kaltenbacher of AAU Klagenfurt will present her recent work entitled  \nOptimization based formulation and regularization of inverse problems \nAbstract: \n  \nThe conventional way of formulating inverse problems such as identification of a (possibly infinite dimensional) parameter\, is via some forward operator\, which is the concatenation of the observation operator with the parameter-to-state-map for the underlying model.\nRecently\, all-at-once formulations have been considered as an alternative to this reduced formulation\, avoiding the use of a parameter-to-state map\, which would sometimes lead to too restrictive conditions. Here the model and the observation are considered simultaneously as one large system with the state and the parameter as unknowns.\nA still more general formulation of inverse problems\, containing both the reduced and the all-at-once formulation\, but also the well-known and highly versatile so-called variational approach (not to be mistaken with variational regularization) as special cases\, is to formulate the inverse problem as a minimization problem (instead of an equation) for the state and parameter. Regularization can be incorporated via imposing constraints and/or adding regularization terms to the objective.  \nIn this talk\, after giving a motivation by formulating the electrical impedance tomography problem by means of the classical Kohn-Vogelius functional\, we will dwell on the regularization aspects  for such variational formulations in an abstract setting. Indeed\, combination of regularization by constraints and by penalization leads to new methods that are applicable without solving forward problems. In particular\, for the EIT problem we will consider a method employing box constraints in a very natural manner to incorporate the discrepancy principle for regularization parameter choice as well as a priori information on the searched for conductivity. \n  \nThe presentation will take place in HS 9. \n  \nPlease join us for coffee at 15:45 in E10. \n 
URL:https://alop.uni-trier.de/event/alop-colloquium-with-barbara-kaltenbacher-universitat-klagenfurt/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20190701T160000
DTEND;TZID=Europe/Berlin:20190701T180000
DTSTAMP:20190531T114609Z
CREATED:20190524T065935Z
LAST-MODIFIED:20190531T114609Z
UID:2810-1561996800-1562004000@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Christopher Hojny\, TU Darmstadt
DESCRIPTION:On Monday\, July 1 2019 at 16:00 c.t.  Dr. Christopher Hojny\, TU Darmstadt  will present his recent work entitled Symmetry Handling in Binary Programs – Combining Symretopes and Orbital Fixing \n  \nAbstract: \nBranch-and-bound is an established method to solve binary programs with thousands of variables in adequate time. If symmetries are present\, however\, even small instances may be hard to solve\, because symmetric parts of the branch-and-bound tree are inspected repeatedly without providing new information. A standard way to handle symmetries in binary programs is to add inequalities that cut off solutions that are lexicographically not maximal in their symmetry classes (orbits). \n  \nIn this talk\, we focus on an approach that generalizes most of the known inequalities. We consider symretopes\, which are the convex hull of all binary vectors that are lexicographically maximal in their orbits. Thus\, adding inequalities of an IP formulation for symretopes to a binary program removes all the symmetry of the program. To derive a tractable IP formulation\, we consider symresacks\, which are knapsack polytopes that are defined by a single symmetry handling inequality. We prove that the optimization problem over symresacks and the separation problem of minimal cover inequalities for symresacks can be solved in almost linear time. This yields an efficiently separable and numerical stable IP formulation of symretopes. \n  \nAnother way to handle symmetries is to fix binary variables if one can show that fixing the variables to the complementary value cannot lead to a lexicographically maximal solution\, so-called orbital fixing. While symmetry handling inequalities and orbital fixing are incompatible\, in general\, we demonstrate how both can be used in parallel if the corresponding problem decomposes in an appropriate way. Numerical experiments show that using both approaches simultaneously improves on using either of these methods. \n  \n  \nThe presentation will take place in HS 9. \n  \nPlease join us for coffee at 15:45 in E10. \n 
URL:https://alop.uni-trier.de/event/alop-colloquium-with-christopher-hojny-tu-darmstadt/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20191007
DTEND;VALUE=DATE:20191011
DTSTAMP:20210329T074143Z
CREATED:20190312T134348Z
LAST-MODIFIED:20210329T074143Z
UID:2723-1570406400-1570751999@alop.uni-trier.de
SUMMARY:Autumn School on Optimal Control and Optimization with PDE's
DESCRIPTION:The Research Training Group on Algorithmic Optimization proudly announces its fourth annual \nAutumn School from October 7 – 10\, 2019. \nThis year’s focus will be on Optimal Control and Optimization with PDE’s\n \n  \nConfirmed speakers are: \nProf. Dr. Alfio Borzì (Universität Würzburg) \nProf. Dr. Michael Hintermüller (HU Berlin) \nProf. Dr. Michael Hinze (Universität Koblenz-Landau) \n  \n  \nOrganizers:  \n \nNicole Marheineke (Trier University)\, \nVolker Schulz (Trier University) \n  \nSchedule\, Location and Travel Information:  \n \nThe workshop schedule is available here. \nThe schedule of poster presentations may be downloaded here. \nThe workshop is scheduled to begin on Monday\, October 7\, 2019 with registration at 8:00 am and end on Thursday\, October 10\, 2019 in the afternoon. \n\nThe workshop will take place in Building E located on Campus I at Trier University. \nFor travel tips on how to get to Trier\, please check  here;\nInstructions on how to find Campus I are located here. \n \n  \nHotel Room Reservations \nWe have a reserved a hotel room contingent at the Altstadt Hotel\, Am Porta Nigra Platz\, 54292 Trier. Please contact them directly to make your reservations referencing the AUTUMN SCHOOL 2019. \nThe contingent will be available for reservation until August 1\, 2019\, or until all available rooms have been booked. \nRegistration information: \n  \n  \nThere will be a registration fee of 70 €. Detailed payment information will be communicated upon registration. \nQualified participants may be eligible for a stipend to assist with travel expenses. In order to be considered for the stipend\, please submit a CV (which should include the names and contact information of two professional references) along with a one-page letter of motivation before July 15\, 2019. You should also prepare a poster for presentation at this event.\n \nRegistration will close September 20\, 2019.
URL:https://alop.uni-trier.de/event/autumn-school-on-optimal-control-and-optimization-with-pdes/
LOCATION:Trier University\, E Building\, Universitätsring 15\, Trier\, Germany
CATEGORIES:Autumn School,Workshop
ATTACH;FMTTYPE=image/jpeg:https://alop.uni-trier.de/wp-content/uploads/2019/10/AS-2019-foto.jpg
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191031T090000
DTEND;TZID=Europe/Berlin:20191031T170000
DTSTAMP:20191017T111027Z
CREATED:20191017T111027Z
LAST-MODIFIED:20191017T111027Z
UID:3135-1572512400-1572541200@alop.uni-trier.de
SUMMARY:Career Coaching Workshop with Dr. Angela Heinrich
DESCRIPTION:A Career Coaching workshop geared towards PhD students will take place on October 31\, 2019 from 9 am to 5 pm in the Gästeraum (Mensa Building).  This promises to be an interactive workshop addressing\, among other things\, career planning and goals as well as  professional job negotiations. Dr. Heinrich is a renowned professional with experience in Neuroscience and systemic coaching. \n  \nWhen: October 31\, 2019                   9 – 5 \nWhere: Gästeraum in the Mensa Building \n 
URL:https://alop.uni-trier.de/event/career-coaching-workshop-with-dr-angela-heinrich/
LOCATION:Gästeraum near Mensa\, Trier University
CATEGORIES:Workshop
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191104T160000
DTEND;TZID=Europe/Berlin:20191104T180000
DTSTAMP:20191016T125229Z
CREATED:20191016T125229Z
LAST-MODIFIED:20191016T125229Z
UID:3127-1572883200-1572890400@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Prof. Dr. Volker Kaibel
DESCRIPTION:On Monday\, November 4 2019 at 16:00 c.t.  Prof. Dr. Volker Kaibel\, Otto-von-Guericke-Universität Magdeburg  will present his recent work entitled \n  \nProjections in Combinatorial Optimization \nFormulating problems via linear inequalities and projections is at the heart of the polyhedral combinatorics approach to Combinatorial Optimization. We present some examples for which this can be achieved with surprisingly few inequalities and we give an almost pictorial proof showing that for other problems exponentially many inequalities are required. \n  \nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10
URL:https://alop.uni-trier.de/event/alop-colloquium-with-prof-dr-volker-kaibel/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191113T120000
DTEND;TZID=Europe/Berlin:20191113T130000
DTSTAMP:20191106T124926Z
CREATED:20191106T124926Z
LAST-MODIFIED:20191106T124926Z
UID:3186-1573646400-1573650000@alop.uni-trier.de
SUMMARY:Research Seminar Talk by Patricia Doerr
DESCRIPTION:Patricia Doerr is scheduled to speak about her research in the Research Seminar on Wednesday\, November 13\, 2019 at noon in E 51.
URL:https://alop.uni-trier.de/event/research-seminar-talk-by-patricia-doerr/
LOCATION:Trier University\, E Building\, Universitätsring 15\, Trier\, Germany
CATEGORIES:Presentation
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191118T120000
DTEND;TZID=Europe/Berlin:20191206T120000
DTSTAMP:20191010T093502Z
CREATED:20191009T124453Z
LAST-MODIFIED:20191010T093502Z
UID:3062-1574078400-1575633600@alop.uni-trier.de
SUMMARY:Short Course on Tensor Numerical Methods in Scientific Computing
DESCRIPTION:Prof. Dr. Boris Khoromskij   with the assistance of Dr. Venera Khoromskaia is offering a short course on Tensor Numerical Methods in Scientific Computing at Trier University on behalf of the Research Training Group on Algorithmic Optimization.  \nThe course will consist of several two hour lectures as follows: \nMonday\,                           18 Nov 2019                   12:00 – 14:00                                                E 52 \nTuesday\,                          19 Nov 2019                   10:00 – 12:00                                                E 45 \nWednesday\,                     20 Nov 2019                   14:00 – 16:00                                              HS 10 \nThursday\,                         21 Nov 2019                   14:00 – 16:00                                                E 10 \nFriday\,                               22 Nov 2019                  10:00 – 12:00                                                E 44 \nMonday\,                              2 Dec 2019                   12:00 – 14:00                                                E 52 \nTuesday\,                             3 Dec 2019                   10:00 – 12:00                                                E 45 \nWednesday\,                       4 Dec 2019                    14:00 – 16:00                                              HS 10 \nThursday\,                           5 Dec 2019                   12:00 – 14:00                                                E 10 \nFriday\,                                 6 Dec 2019                   10:00 – 12:00                                                E 44 \nCourse Abstract:\nSolution of multi-dimensional problems by traditional numerical methods suffer from the so-called “curse of dimensionality”\, that cannot be eliminated by using parallel architectures and high performance computing. The novel tensor numerical methods are based on a “smart” rank-structured tensor   representation of the multivariate functions and operators\, thus reducing solution of multidimensional integral-differential equations to 1D   calculations. We show how the canonical\, Tucker\, tensor train (TT)\, quantized-TT (QTT) and range-separated tensor approximations  provide the way to solve the multi-dimensional equations on  low-parametric rank-structured manifolds. We consider tensor methods for the elliptic optimal control problems\, for elliptic PDEs with oscillating coefficients and for some quantum chemical  models. Matlab exercises for the tensor decomposition algorithms will be provided. \nFor a printout of this information\, please click here. \n 
URL:https://alop.uni-trier.de/event/short-course-on-tensor-numerical-methods-in-scientific-computing/
CATEGORIES:Short Course
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191125T120000
DTEND;TZID=Europe/Berlin:20191126T170000
DTSTAMP:20191115T102551Z
CREATED:20191107T134025Z
LAST-MODIFIED:20191115T102551Z
UID:3214-1574683200-1574787600@alop.uni-trier.de
SUMMARY:GUT Course scheduled for November 25- 26\, 2019
DESCRIPTION:Dr. Michael Mende with the University of Konstanz\, Germany is scheduled to teach a course on good scientific practice to the students of the Research Training Group on November 25 and 26\, 2019.  The event will take place in room V302.
URL:https://alop.uni-trier.de/event/gut-course-scheduled-for-november-25-26-2019/
LOCATION:Trier University\, E Building\, Universitätsring 15\, Trier\, Germany
CATEGORIES:Short Course
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191127T120000
DTEND;TZID=Europe/Berlin:20191127T130000
DTSTAMP:20191106T124739Z
CREATED:20191106T124739Z
LAST-MODIFIED:20191106T124739Z
UID:3184-1574856000-1574859600@alop.uni-trier.de
SUMMARY:Research Seminar Talk by Dennis Kreber
DESCRIPTION:Dr. Dennis Kreber is scheduled to speak about his research in the Research Seminar on Wednesday\, November 27\, 2019 at noon in E 51.
URL:https://alop.uni-trier.de/event/research-seminar-talk-by-dennis-kreber/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Presentation
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191202T090000
DTEND;TZID=Europe/Berlin:20191202T100000
DTSTAMP:20191104T134817Z
CREATED:20191016T114357Z
LAST-MODIFIED:20191104T134817Z
UID:3120-1575277200-1575280800@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Timm Faulwasser
DESCRIPTION:On Monday\, December 2 2019 at 9:00 c.t.  Prof. Dr. -Ing. Timm Faulwasser\, TU Dortmund will present his recent work entitled \nDissipativity and Turnpike Properties in Optimal Control – Insights and Open Problems\nIn many engineering disciplines and beyond (economics\, physics\, …) performance optimization under explicit consideration of dynamics and operational constraints\, i.e. optimal control\, plays a pivotal role. The last 60 years have seen tremendous progress in terms of optimality conditions and PMP formulations\, and in terms of powerful computational tools. In other words\, as such optimal control theory of finite dimensional systems is a mature subject. \nInspired by physical notions of dissipative and passive systems\, Jan Willems introduced a formal dissipativity notion in 1972\, which can be regarded as an extension of Lyapunov stability notions to systems with inputs [6\,7]. Yet\, triggered by recent developments on so-called economic Model Predictive Control (MPC) [1\,2]\, a system-theoretic notion of dissipativity of Optimal Control Problems (OCPs) has been subject to considerable recent research interest [3\,4\,5]. \nParallel to Willems´ work\, the 1970s also saw manifold contributions\, especially in economics\, to what is commonly called turnpike theorems of OCPs [8]. The term turnpike was coined in a seminal contribution by Dorfman\, Samuelson and Solow in 1958 [9]. It refers to a phenomenon of parametric OCPs\, whereby for varying initial conditions and horizon length\, the time the optimal solutions spend outside of a neighborhood of the turnpike steady state is bounded independent of the horizon length. Early observations of this phenomenon can be traced back to works of John von Neumann from the 1930s/40s. Recently\, turnpike properties have also been studied in time-varying and infinite-dimensional settings [10\,11]. \nThe main focus of this seminar is to provide insights into the link between turnpike and dissipativity properties of OCPs. Motivated by examples we will propose a formal definition of turnpike properties\, which enables the derivation of converse turnpike results.  To this end\, we recap the dissipativity notion of Willems and show how it can be applied to OCPs. Moreover\, we will also provide insights into different viewpoints on turnpikes (primal vs. primal-dual)\, which link the phenomenon with the stability of a specific equilibrium of the Hamiltonian optimality system. Finally\, we will provide an outlook on time-varying and periodic turnpikes and on turnpikes in mixed-integer problems \n  \nReferences \n\nAngeli\, David\, Rishi Amrit\, and James B. Rawlings. “On average performance and stability of economic model predictive control.” IEEE transactions on automatic control 57.7 (2011): 1615-1626.\nFaulwasser\, Timm\, Lars Grüne\, and Matthias A. Müller. “Economic nonlinear model predictive control.” Foundations and Trends® in Systems and Control 5.1 (2018): 1-98.\nFaulwasser\, T.\, Korda\, M.\, Jones\, C. N.\, & Bonvin\, D. (2017). On turnpike and dissipativity properties of continuous-time optimal control problems. Automatica\, 81\, 297-304.\nMüller\, Matthias A.\, David Angeli\, and Frank Allgöwer. “On necessity and robustness of dissipativity in economic model predictive control.” IEEE Transactions on Automatic Control 60.6 (2014): 1671-1676.\nGrüne\, Lars\, and Matthias A. Müller. “On the relation between strict dissipativity and turnpike properties.” Systems & Control Letters 90 (2016): 45-53.\nWillems\, Jan C. “Dissipative dynamical systems part I: General theory.” Archive for rational mechanics and analysis 45.5 (1972): 321-351.\nWillems\, Jan C. “Dissipative dynamical systems.” European Journal of Control 13.2-3 (2007): 134-151.\nMcKenzie\, Lionel W. “Turnpike theory.” Econometrica: Journal of the Econometric Society (1976): 841-865.\nDorfman\, R.\, Samuelson\, P. A.\, and RM Solow. Linear Programming and Economic Analysis (1958).\nGugat\, M.\, Trélat\, E.\, & Zuazua\, E. (2016). Optimal Neumann control for the 1D wave equation: Finite horizon\, infinite horizon\, boundary tracking terms and the turnpike property. Systems & Control Letters\, 90\, 61-70.\nGrüne\, L.\, Pirkelmann\, S.\, & Stieler\, M. (2018). Strict dissipativity implies turnpike behavior for time-varying discrete time optimal control problems. In Control Systems and Mathematical Methods in Economics (pp. 195-218). Springer\, Cham.\n\n  \nBio Sketch \nTimm Faulwasser has studied Engineering Cybernetics at the University Stuttgart\, with majors in systems and control and philosophy. He completed his PhD at the Otto-von-Guericke University Magdeburg\, Germany\, where he was also a member of the International Max Planck Research School for Analysis\, Design and Optimization in Chemical and Biochemical Process Engineering Magdeburg. 2013-2016 he was with the Laboratoire d’Automatique\, École Polytechnique Fédérale de Lausanne\, Switzerland. During 2015-2019 he led the Optimization and Control Group at the Institute for Automation and Applied Informatics\, Karlsruhe Institute for Technology. Since November 2019 he holds the Chair for Energy Efficiency at the Department of Electrical Engineering and Information Technology of TU Dortmund. \nHis main research interests are optimization-based and predictive control of networks of nonlinear systems with applications in energy systems\, process systems engineering and climate economics. \n  \nThe presentation will take place in E 51.  Coffee will be served. \n 
URL:https://alop.uni-trier.de/event/alop-colloquium-with-dr-timm-faulwasser/
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191204T120000
DTEND;TZID=Europe/Berlin:20191204T140000
DTSTAMP:20191128T141658Z
CREATED:20191128T141618Z
LAST-MODIFIED:20191128T141658Z
UID:3258-1575460800-1575468000@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Stefan Weltge
DESCRIPTION:On Wednesday\, December 4\, 2019 at 12:00 c.t.\, Prof. Dr. Stefan Weltge\, Assistant Professor at Technical University Munich (TUM) will present his recent work entitled \nPersistency of Linear Programming Relaxations for Stable Set \nAbstract: \n  \nThe Nemhauser-Trotter theorem states that the standard linear programming (LP) relaxation for the stable set problem has a remarkable property\, also known as the (weak) persistency property:  for every optimal LP solution that assigns integer values to some variables\, there exists an optimal integer solution in which these variables retain the same values. \nWhile the standard LP is defined by only non-negativity and edge constraints\, a variety of stronger LP relaxations have been studied and one may wonder whether any of them is persistent as well. We show that any stronger family of LP relaxations that satisfies mild conditions cannot be persistent on all graphs\, unless it is always equal to the stable-set polytope. \nThis is recent joint work with Elisabeth Rodríguez-Heck\, Karl Stickler and Matthias Walter.   \n  \nThe presentation will take place in E 51. \nCoffee will be served.
URL:https://alop.uni-trier.de/event/alop-colloquium-with-stefan-weltge/
LOCATION:Trier University E Building\, Universitätsring 15\, Trier\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191211T120000
DTEND;TZID=Europe/Berlin:20191211T130000
DTSTAMP:20191115T102505Z
CREATED:20191114T131921Z
LAST-MODIFIED:20191115T102505Z
UID:3230-1576065600-1576069200@alop.uni-trier.de
SUMMARY:Research Seminar Talk by Lukas Winkel
DESCRIPTION:Lukas Winkel is scheduled to speak about his research entitled \n“A Soft Branch & Bound Algorithm for Mixed Integer Linear Complementarity Problems” \nin the Research Seminar on Wednesday\, December 11\,  2019 at noon in E 51.
URL:https://alop.uni-trier.de/event/research-seminar-talk-by-lukas-winkel/
LOCATION:Trier University\, E Building\, Universitätsring 15\, Trier\, Germany
CATEGORIES:Presentation
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191219T160000
DTEND;TZID=Europe/Berlin:20191219T170000
DTSTAMP:20191105T131541Z
CREATED:20191105T130829Z
LAST-MODIFIED:20191105T131541Z
UID:3179-1576771200-1576774800@alop.uni-trier.de
SUMMARY:ALOP Colloquium with Martine Labbé
DESCRIPTION:On Thursday\, December 19 2019 at 16:00 c.t.  Dr. Martine Labbé\, Université Libre de Bruxelles  will present her recent work \nTitle and Abstract will follow. \n  \nThe presentation will take place in HS 9. \nPlease join us for coffee at 15:45 in E10.
URL:https://alop.uni-trier.de/event/alop-colloquium-with-martine-labbe/
LOCATION:Trier University – E-Building – HS 9\, Universität Trier Gebäude E\, Trier\, Rhineland-Palatinate\, 54296\, Germany
CATEGORIES:Colloquium
ORGANIZER;CN="RTG ALOP at Trier University":MAILTO:ALOP@uni-trier.de
END:VEVENT
END:VCALENDAR