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Datum | Sprecher / Thema |
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07.05.2024 | Aryaman Jal ( KTH Royal Institute of Technology Stockholm ) Polyhedral combinatorics of bisectors and bisection fans Abstract: Every symmetric convex body induces a norm on its affine hull. The object of our study is the bisector of two points with respect to this norm. A topological description of bisectors is known in the 2 and 3-dimensional cases and recent work of Criado, Joswig and Santos (2022) expanded this to a fuller characterisation of the geometric, combinatorial and topological properties of the bisector. A key object introduced was the bisection fan of a polytope which they were able to explicitly describe in the case of the tropical norm. We will discuss the bisector as a polyhedral complex, introduce the notion of bisection cones and give combinatorial descriptions of the bisection fan corresponding to other polyhedral norms. This is joint work with Katharina Jochemko. | |
06.02.2024 | Moritz Grillo ( TU Berlin ) Topological Expressivity of ReLU Neural Networks | |
07.11.2023 | Christoph Hertrich ( Goethe Universität ) How to Use Polyhedral Theory to Understand Neural Networks | |
26.09.2023 | Laura Kossytorz Multi-Splits of Point Configurations in the Plane (Bachelor-Abschlussvortrag) | |
06.06.2023 | Kristina Wicke ( New Jersey Institute of Technology ) Mathematical approaches to biodiversity conservation: some recent developments and challenges in phylogenetic diversity research | |
23.05.2023 | Eugen Cernomazov Basis-Austauschgraphen von induzierten Fahnenmatroiden (Bachelor-Abschlussvortrag) | |
16.05.2023 | Lorenzo Vecchi ( Universität Bologna ) Categorical valuative invariants of matroids |
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09.05.2023 |
Jacob Matherne ( MPI und Universität Bonn ) Polynomials in combinatorics and representation theory |
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02.05.2023 | Katherina von Dichter (TU München und BTU Cottbus) The diameter-width-ratio for complete and pseudo-complete sets |
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25.04.2023 | Linus Eschmann Der Potenzkegel in der konvexen Optimierung (Bachelor-Abschlussvortrag) |
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18.04.2023 | Christopher Lorenz:
Insider trading in discrete time Kyle games |
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28.02.2023 | Nadine Defoßa Sublineare Kreise in der restringierten Optimierung von Signomen (Master-Abschlussvortrag) |
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07.02.2023 |
Benjamin Schröter Valuative invariants for large classes of matroids |
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13.12.2022 | Doppelvortrag Jan Stricker Über die Geometrie und Kombinatorik von 2-level Polytopen (Bachelor-Abschlussvortrag) Jakob DanyVerallgemeinerte Bipermutaeder (Bachelor-Abschlussvortrag) |
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25.10.2022 |
Irem Portakal (TU München): Nonlinear algebra in game theory |
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04.10.2022 |
Marlene Meißner: Beziehungen zwischen stabilen Polynomen und Matroidtheorie (Bachelor-Abschlussvortrag) |
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12.09.2022 |
Marcel Wack Restringierte signomiale Optimierung mittels eines SAGE-Positivstellensatzes (Master-Abschlussvortrag) |
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30.08.2022 | David Zimmermann Optimale Punkte konditionaler SAGE-Zertifikate in der signomialen Optimierung (Master-Abschlussvortrag) |
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19.07.2022 | Federico Castillo (Universidad Católica de Chile) Polyhedral bases for deformation cones |
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12.07.2022 | Constantin Ickstadt Eine semidefinite Verallgemeinerung von Bimatrixspielen (Master-Abschlussvortrag) |
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24.06.2022, |
"Frankfurt-Darmstadt Afternoon on Optimization" Venkat Chandrasekaran (California Institute of Technology) Fitting Tractable Convex Sets to Support Function Data Max Klimm (TU Berlin): Optimal Information Design for Congested Networks |
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21.06.2022 | Doppelvortrag: Katharina Jochemko (KTH Stockholm @ Frankfurt) The Eulerian transformation Darij Grinberg (Drexel University @ Bochum) The one-sided cycle shuffles in the symmetric group algebra |
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14.06.2022 | Bastian von Harrach (Goethe-Universität) Von inversen Problemen in partiellen Differentialgleichungen zu semidefiniter Optimierung |
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07.06.2022 | Germain Poullot (Sorbonne Université) Deformation cones of hypergraphic polytopes |
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24.05.2022 | Doppelvortrag: Luis Ferroni (KTH Stochholm @ Bochum) Valuative invariants for large classes of matroids Lorenzo Venturello (KTH Stockholm @ Frankfurt) Gorenstein algebras from simplicial complexes |
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17.05.2022 | Andrés Vindas Meléndez (MSRI/Berkeley) Ehrhart Theory of Paving and Panhandle Matroids (Abstract) | |
19.04.2022 | Niklas Lütjeharms Geometrie und Kombinatorik von Max-Slope-Pivotpolytopen (Master-Abschlussvortrag) |
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05.04.2022 | Jonas Ellwanger Nichtnegative Signome mit wenigen negativen Termen (Bachelor-Abschlussvortrag) |
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15.02.2022 |
Frederic Matter (TU Darmstadt) Sparse Recovery Under Side Constraints Using Null Space Properties (Abstract) |
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08.02.2022 |
Gaku Liu (Uni Washington) Unimodular triangulations of sufficiently large dilations (Abstract) |
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01.02.2022 |
Lukas Kühne (Uni Bielefeld) Geometry of Flag Hilbert-Poincaré series (Abstract) |
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25.01.2022 |
Philip Dörr (Magdeburg) Extreme Values of Permutation Statistics in Suitable Triangular Arrays (Abstract) |
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07.12.2021 |
Mariel Supina (KTH) The Universal Valuation for Coxeter Matroids (Abstract) |
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30.11.2021 |
Georg Loho (Twente) Generalized permutahedra and complete classes of valuated matroids (Abstract) |
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23.11.2021 |
Laura Escobar (WUSL) Determining the complexity of Kazhdan-Lusztig varieties (Abstract) |
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16.11.2021 |
Jesus de Loera (University of California) Stochastic Tverberg-type theorems and their relevance in Machine Learning and Statistical Inference (Abstract) |
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26.10.2021 |
Alexander Black (University of California, Davis) Polyhedral Geometry of Pivot Rules (Abstract) |
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26.10.2021 |
Christian Krattenthaler (Universität Wien) Reciprocity between Dyck paths and alternating sequences - heaps, orthogonal polynomials, … (Abstract) |
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06.07.2021 |
Sebastian Debus (UiT - The Arctic University of Norway) Higher Specht polynomials and sums of squares (Abstract) |
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29.06.2021 |
Ralph Morrison (Williams College) Tropically planar graphs: counting and constraints (Abstract) |
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22.06.2021 |
Eva Philippe (École Normale Supérieure de Paris) Sweep polytopes, lineup polytopes, and generalized exclusion principle in quantum physics (Abstract) |
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15.06.2021 |
Sven Geserick Multivariate Matching-Polynome (Bachelor-Abschlussvortrag) |
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08.06.2021 |
Sophie Rehberg (FU Berlin) Combinatorial reciprocity theorems for generalized permutahedra, hypergraphs, and pruned inside-out polytopes (Abstract) |
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25.05.2021 |
Henri Mühle (TU Dresden) Posets from Polytopes and Refined Face Enumeration (Abstract) |
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11.05.2021 |
Dominik Sorg Konvexe Ecken, Spiegelungsgruppen und das Mahler-Volumen (Master-Abschlussvortrag) |
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04.05.2021 |
Adriana Knop Summen nichtnegativer Kreispolynome und reguläre Unterteilungen (Master-Abschlussvortrag) |
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13.04.2021 |
Mahsa Sayyary (Goethe-Universität) Real algebraic geometry of plane curves |