Seminarium, Kombinatorik

Eran Nevo: Face enumeration in flag complexes

3 mar

Seminarium, Kombinatorik

onsdag 2021-03-03, 10.15 - 11.15

Medverkande: Eran Nevo (Hebrew University)

Plats: Zoom meeting ID: 654 5562 3260

2021-03-03T10:15:00.000+01:00 2021-03-03T11:15:00.000+01:00 Eran Nevo: Face enumeration in flag complexes (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Eran Nevo: Face enumeration in flag complexes (Seminarium, Kombinatorik)

Luca Schaffler: Point configurations, phylogenetic trees, and dissimilarity vectors

10 mar

Seminarium, Kombinatorik

onsdag 2021-03-10, 10.15 - 11.15

Medverkande: Luca Schaffler (KTH)

2021-03-10T10:15:00.000+01:00 2021-03-10T11:15:00.000+01:00 Luca Schaffler: Point configurations, phylogenetic trees, and dissimilarity vectors (Seminarium, Kombinatorik) Luca Schaffler: Point configurations, phylogenetic trees, and dissimilarity vectors (Seminarium, Kombinatorik)

Martin Winter: Capturing Polytopal Symmetries in the Edge-Graph

24 mar

Seminarium, Kombinatorik

onsdag 2021-03-24, 10.15 - 11.15

Medverkande: Martin Winter (TU Chemnitz)

Plats: Zoom meeting ID: 654 5562 3260

2021-03-24T10:15:00.000+01:00 2021-03-24T11:15:00.000+01:00 Martin Winter: Capturing Polytopal Symmetries in the Edge-Graph (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Martin Winter: Capturing Polytopal Symmetries in the Edge-Graph (Seminarium, Kombinatorik)

Matthias Schymura: Complexity of linear relaxations in integer programming

31 mar

Seminarium, Kombinatorik

onsdag 2021-03-31, 10.15 - 11.15

Medverkande: Matthias Schymura (BTU Cottbus-Senftenberg)

Plats: Zoom meeting ID: 654 5562 3260

2021-03-31T10:15:00.000+02:00 2021-03-31T11:15:00.000+02:00 Matthias Schymura: Complexity of linear relaxations in integer programming (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Matthias Schymura: Complexity of linear relaxations in integer programming (Seminarium, Kombinatorik)

Colin Defant: Fertilitopes

14 apr

Seminarium, Kombinatorik

onsdag 2021-04-14, 15.15 - 16.15

Medverkande: Colin Defant (Princeton University)

Plats: Zoom meeting ID: 654 5562 3260

2021-04-14T15:15:00.000+02:00 2021-04-14T16:15:00.000+02:00 Colin Defant: Fertilitopes (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Colin Defant: Fertilitopes (Seminarium, Kombinatorik)

Anders Claesson: On the problem of Hertzsprung and similar problems

21 apr

Seminarium, Kombinatorik

onsdag 2021-04-21, 10.15 - 11.15

Medverkande: Anders Claesson (University of Iceland)

Plats: Zoom meeting ID: 654 5562 3260

2021-04-21T10:15:00.000+02:00 2021-04-21T11:15:00.000+02:00 Anders Claesson: On the problem of Hertzsprung and similar problems (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Anders Claesson: On the problem of Hertzsprung and similar problems (Seminarium, Kombinatorik)

Thomas Lam: Polypositroids

28 apr

Seminarium, Kombinatorik

onsdag 2021-04-28, 15.15 - 16.15

Medverkande: Thomas Lam

Plats: Zoom meeting ID: 654 5562 3260

2021-04-28T15:15:00.000+02:00 2021-04-28T16:15:00.000+02:00 Thomas Lam: Polypositroids (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Thomas Lam: Polypositroids (Seminarium, Kombinatorik)

Julian Pfeifle: Positive Plücker Tree Certificates for Non-Realizability

5 maj

Seminarium, Kombinatorik

onsdag 2021-05-05, 10.15 - 11.15

Medverkande: Julian Pfeifle (UPC Barcelona)

Plats: Zoom meeting ID: 654 5562 3260

2021-05-05T10:15:00.000+02:00 2021-05-05T11:15:00.000+02:00 Julian Pfeifle: Positive Plücker Tree Certificates for Non-Realizability (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Julian Pfeifle: Positive Plücker Tree Certificates for Non-Realizability (Seminarium, Kombinatorik)

Amy Wiebe: A combinatorial approach to Minkowski tensors of polytopes

12 maj

Seminarium, Kombinatorik

onsdag 2021-05-12, 10.15 - 11.15

Medverkande: https://kth-se.zoom.us/j/65455623260

Plats: Zoom meeting ID: 654 5562 3260

2021-05-12T10:15:00.000+02:00 2021-05-12T11:15:00.000+02:00 Amy Wiebe: A combinatorial approach to Minkowski tensors of polytopes (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Amy Wiebe: A combinatorial approach to Minkowski tensors of polytopes (Seminarium, Kombinatorik)

Jonathan Leake: Transportation polytope volume bounds via polynomial capacity and Lorentzian polynomials

19 maj

Seminarium, Kombinatorik

onsdag 2021-05-19, 15.15 - 16.15

Medverkande: Jonathan Leake (TU Berlin)

Plats: Zoom meeting ID: 654 5562 3260

2021-05-19T15:15:00.000+02:00 2021-05-19T16:15:00.000+02:00 Jonathan Leake: Transportation polytope volume bounds via polynomial capacity and Lorentzian polynomials (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Jonathan Leake: Transportation polytope volume bounds via polynomial capacity and Lorentzian polynomials (Seminarium, Kombinatorik)

Eleni Tzanaki: Symmetric decompositions, triangulations and real-rootedness

26 maj

Seminarium, Kombinatorik

onsdag 2021-05-26, 10.15 - 11.15

Medverkande: Eleni Tzanaki (University of Crete)

Plats: Zoom meeting ID: 654 5562 3260

2021-05-26T10:15:00.000+02:00 2021-05-26T11:15:00.000+02:00 Eleni Tzanaki: Symmetric decompositions, triangulations and real-rootedness (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Eleni Tzanaki: Symmetric decompositions, triangulations and real-rootedness (Seminarium, Kombinatorik)

Emanuele Delucchi: Supersolvable posets and the K(\pi,1) property for Abelian arrangements.

9 jun

Seminarium, Kombinatorik

onsdag 2021-06-09, 10.15 - 11.15

Medverkande: Emanuele Delucchi (IDSIA-SUPSI e Università di Pisa)

Plats: Zoom, meeting ID: 654 5562 3260

2021-06-09T10:15:00.000+02:00 2021-06-09T11:15:00.000+02:00 Emanuele Delucchi: Supersolvable posets and the K(\pi,1) property for Abelian arrangements. (Seminarium, Kombinatorik) Zoom, meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Emanuele Delucchi: Supersolvable posets and the K(\pi,1) property for Abelian arrangements. (Seminarium, Kombinatorik)

Luis Ferroni: Matroids are not Ehrhart positive

16 jun

Seminarium, Kombinatorik

onsdag 2021-06-16, 10.15 - 11.15

Medverkande: Luis Ferroni (Università di Bologna)

Plats: Zoom meeting ID: 654 5562 3260

2021-06-16T10:15:00.000+02:00 2021-06-16T11:15:00.000+02:00 Luis Ferroni: Matroids are not Ehrhart positive (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Luis Ferroni: Matroids are not Ehrhart positive (Seminarium, Kombinatorik)

Alexander Lazar: q-Enumeration of Barely Set-Valued Tableaux and P-Partitions

23 jun

Seminarium, Kombinatorik

onsdag 2021-06-23, 10.15 - 11.15

Medverkande: Alexander Lazar (KTH)

Plats: Zoom meeting ID: 654 5562 3260

2021-06-23T10:15:00.000+02:00 2021-06-23T11:15:00.000+02:00 Alexander Lazar: q-Enumeration of Barely Set-Valued Tableaux and P-Partitions (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Alexander Lazar: q-Enumeration of Barely Set-Valued Tableaux and P-Partitions (Seminarium, Kombinatorik)

Chris Eur:Tautological classes of matroids

1 sep

Seminarium, Kombinatorik

onsdag 2021-09-01, 15.15 - 16.15

Medverkande: Chris Eur (Harvard University)

Plats: Zoom meeting ID: 654 5562 3260

2021-09-01T15:15:00.000+02:00 2021-09-01T16:15:00.000+02:00 Chris Eur:Tautological classes of matroids (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Chris Eur:Tautological classes of matroids (Seminarium, Kombinatorik)

Mariel Supina:Equivariant Ehrhart theory: Overview and recent results

8 sep

Seminarium, Kombinatorik

onsdag 2021-09-08, 10.15 - 11.15

Plats: Zoom meeting ID: 654 5562 3260

2021-09-08T10:15:00.000+02:00 2021-09-08T11:15:00.000+02:00 Mariel Supina:Equivariant Ehrhart theory: Overview and recent results (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Mariel Supina:Equivariant Ehrhart theory: Overview and recent results (Seminarium, Kombinatorik)

Akihiro Higashitani:Universal inequalities for h*-vectors of lattice polytopes

15 sep

Seminarium, Kombinatorik

onsdag 2021-09-15, 10.15 - 11.15

Plats: Zoom meeting ID: 654 5562 3260

2021-09-15T10:15:00.000+02:00 2021-09-15T11:15:00.000+02:00 Akihiro Higashitani:Universal inequalities for h*-vectors of lattice polytopes (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Akihiro Higashitani:Universal inequalities for h*-vectors of lattice polytopes (Seminarium, Kombinatorik)

Peter J. Cameron:The geometry of diagonal groups

22 sep

Seminarium, Kombinatorik

onsdag 2021-09-22, 10.15 - 11.15

Medverkande: Peter J. Cameron (University of St Andrews)

Plats: Zoom meeting ID: 654 5562 3260

2021-09-22T10:15:00.000+02:00 2021-09-22T11:15:00.000+02:00 Peter J. Cameron:The geometry of diagonal groups (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Peter J. Cameron:The geometry of diagonal groups (Seminarium, Kombinatorik)

Eva Philippe:Sweep polytopes and sweep oriented matroids

29 sep

Seminarium, Kombinatorik

onsdag 2021-09-29, 10.15 - 11.15

Medverkande: Eva Philippe (Sorbonne Université)

Plats: Zoom meeting ID: 654 5562 3260

2021-09-29T10:15:00.000+02:00 2021-09-29T11:15:00.000+02:00 Eva Philippe:Sweep polytopes and sweep oriented matroids (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Eva Philippe:Sweep polytopes and sweep oriented matroids (Seminarium, Kombinatorik)

Richard Stanley: Two Analogues of Pascal's Triangle

6 okt

Seminarium, Kombinatorik

onsdag 2021-10-06, 15.15 - 16.15

Medverkande: Richard Stanley (M.I.T. and University of Miami)

Plats: Zoom meeting ID: 654 5562 3260

2021-10-06T15:15:00.000+02:00 2021-10-06T16:15:00.000+02:00 Richard Stanley: Two Analogues of Pascal's Triangle (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Richard Stanley: Two Analogues of Pascal's Triangle (Seminarium, Kombinatorik)

Lukas Kühne: Matroids and Algebra

13 okt

Seminarium, Kombinatorik

onsdag 2021-10-13, 10.15 - 11.15

Medverkande: Lukas Kühne (Max Planck Institute of Mathematics in the Sciences, Leipzig)

Plats: Zoom meeting ID: 654 5562 3260

2021-10-13T10:15:00.000+02:00 2021-10-13T11:15:00.000+02:00 Lukas Kühne: Matroids and Algebra (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Lukas Kühne: Matroids and Algebra (Seminarium, Kombinatorik)

Luis Ferroni:Valuative invariants for large classes of matroids

20 okt

Seminarium, Kombinatorik

onsdag 2021-10-20, 10.15 - 11.15

Medverkande: Luis Ferroni (Università di Bologna)

Plats: Zoom meeting ID: 654 5562 3260

2021-10-20T10:15:00.000+02:00 2021-10-20T11:15:00.000+02:00 Luis Ferroni:Valuative invariants for large classes of matroids (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Luis Ferroni:Valuative invariants for large classes of matroids (Seminarium, Kombinatorik)

Hailun Zheng: Techniques in constructing neighborly polytopes and spheres

27 okt

Seminarium, Kombinatorik

onsdag 2021-10-27, 10.15 - 11.15

Medverkande: Hailun Zheng (University of Copenhagen)

Plats: Zoom meeting ID: 654 5562 3260

2021-10-27T10:15:00.000+02:00 2021-10-27T11:15:00.000+02:00 Hailun Zheng: Techniques in constructing neighborly polytopes and spheres (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Hailun Zheng: Techniques in constructing neighborly polytopes and spheres (Seminarium, Kombinatorik)

Daniel Köhne: Laplacian Polytopes of Oriented Simplicial Complexes

3 nov

Seminarium, Kombinatorik

onsdag 2021-11-03, 10.15 - 11.15

Medverkande: Daniel Köhne (Universität Osnabrück)

Plats: Zoom meeting ID: 654 5562 3260

2021-11-03T10:15:00.000+01:00 2021-11-03T11:15:00.000+01:00 Daniel Köhne: Laplacian Polytopes of Oriented Simplicial Complexes (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Daniel Köhne: Laplacian Polytopes of Oriented Simplicial Complexes (Seminarium, Kombinatorik)

Jorge Olarte: The tropical symplectic Grassmannian

10 nov

Seminarium, Kombinatorik

onsdag 2021-11-10, 10.15 - 11.15

Medverkande: Jorge Olarte (TU Berlin)

Plats: Zoom meeting ID: 654 5562 3260

2021-11-10T10:15:00.000+01:00 2021-11-10T11:15:00.000+01:00 Jorge Olarte: The tropical symplectic Grassmannian (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Jorge Olarte: The tropical symplectic Grassmannian (Seminarium, Kombinatorik)

Bin Han: On the gamma-positivity of binomial Eulerian polynomials for colored permutations

17 nov

Seminarium, Kombinatorik

onsdag 2021-11-17, 10.15 - 11.15

Medverkande: Bin Han (KTH)

Plats: Zoom meeting ID: 654 5562 3260

2021-11-17T10:15:00.000+01:00 2021-11-17T11:15:00.000+01:00 Bin Han: On the gamma-positivity of binomial Eulerian polynomials for colored permutations (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Bin Han: On the gamma-positivity of binomial Eulerian polynomials for colored permutations (Seminarium, Kombinatorik)

Galen Dorpalen-Barry: Varchenko-Gel’fand Ring of a "Cone" of a Hyperplane Arrangement

24 nov

Seminarium, Kombinatorik

onsdag 2021-11-24, 10.15 - 11.15

Medverkande: Galen Dorpalen-Barry (Ruhr-Universität Bochum)

Plats: Zoom meeting ID: 654 5562 3260

2021-11-24T10:15:00.000+01:00 2021-11-24T11:15:00.000+01:00 Galen Dorpalen-Barry: Varchenko-Gel’fand Ring of a "Cone" of a Hyperplane Arrangement (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Galen Dorpalen-Barry: Varchenko-Gel’fand Ring of a "Cone" of a Hyperplane Arrangement (Seminarium, Kombinatorik)

Marta Pavelka: 2-LC triangulated manifolds are exponentially many

1 dec

Seminarium, Kombinatorik

onsdag 2021-12-01, 15.15 - 16.15

Medverkande: Marta Pavelka (University of Miami)

Plats: Zoom meeting ID: 654 5562 3260

2021-12-01T15:15:00.000+01:00 2021-12-01T16:15:00.000+01:00 Marta Pavelka: 2-LC triangulated manifolds are exponentially many (Seminarium, Kombinatorik) Zoom meeting ID: 654 5562 3260 (KTH, Stockholm, Sweden)Marta Pavelka: 2-LC triangulated manifolds are exponentially many (Seminarium, Kombinatorik)