Matroids, Reflection Groups, and Free Hyperplane Arrangements
11 (Mon) -- 15 (Fri) June, 2018 at
RIMS, Kyoto University (Room 111).
11 (Mon) June
Luca Moci (Paris 7): Graded bialgebras and deletion-restriction invariants.
Tan Nhat Tran (Hokkaido): Characteristic quasi-polynomial and its applications to root systems.
Nobuki Takayama (Kobe): Contingency tables and hypergeometric polynomials associated to hyperplane arrangements.
Michael DiPasquale (Oklahoma State University): Freeness of multi-arrangements via acyclicity.
Daisuke Suyama (Wakkanai Hokusei Gakuen University): Construction of bases for the extended Catalan and Shi arrangements.
12 (Tue) June
9:20--10:20, Toshiyuki Mano (University of the Ryukyus):
Flat structure on the orbit space of a complex reflection group.
10:40--11:40, Gerhard Roehrle (Ruhr University Bochum): Freeness of multi-reflection arrangements for complex reflection groups.
13:20--14:20, Emanuele Delucchi (University of Fribourg): Stanley-Reisner rings for infinite symmetric simplicial complexes and applications to arrangements.
14:40--15:40, Mikiya Masuda (Osaka City University): Generic torus orbit closures in Schubert varieties.
16:00--16:30, Roberto Pagaria (Scuola Normale Superiore, Pisa): Combinatorics and Cohomology Algebra of Toric Arrangements.
16:30--17:00, Akiko Yazawa (Shinshu University):
The Lefschetz property of an algebra constructed from a graphic matroid.
13 (Wed) June
9:20--10:20, Graham Denham (University of West Ontario): Arrangements, matroids, and CSM classes.
10:40--11:40, Simone Marchesi (IMECC-UNICAMP): Nearly free arrangements: a vector bundle point of view.
12:00--12:30, Takahiro Nagaoka (Kyoto University): Hypertoric varieties and hyperplane arrangements.
14 (Thu) June
9:20--10:20, Yasuhide Numata (Shinshu University): On naturally colored categories and functors.
10:40--11:40, Christin Bibby (University of Michigan): Supersolvable posets.
13:20--14:20, Delphine Pol (Hokkaido University): Subspace arrangements and Solomon-Terao formula.
14:40--15:40, Misha Feigin (University of Glasgow): Quasi-invariants and free multi-arrangements.
16:00--17:00, Kyoji Saito (IPMU): Free arrangements on the extended symmetric domain of type IV.
15 (Fri) June
9:00--10:00, Toshiyuki Akita (Hokkaido University): Coxeter groups, Coxeter quandles, and Artin groups.
10:20--11:20, Shuhei Tsujie (Hiroshima Kokusai Gakuin University): Freeness of arrangements associated to gain graphs.
11:40--12:40, Jean Valles (University of Pau and Pays de l'Adour): Lefschetz properties for Artinian rings and line arrangements.
12:40 -- 15:00 Free dicussion.
Abstracts: Program with Abstracts (PDF)
Takuro Abe(abe (at) imi.kyushu-u.ac.jp )
Masahiko Yoshinaga(yoshinaga (at) math.sci.hokudai.ac.jp)