Talks and Posters

Selected Talks

・Higher-order freeness for hyperplane arrangements,
International Colloquium on Differential Geometry and its Related Fields,
University of Patras, Patras, Greece, Sep. 10, 2023

・Coboundary polynomial and related polynomial invariants,
10th International Congress on Industrial and Applied Mathematics, Minisymposium `Hyperplane arrangements and enumerative problems',
Waseda University, Tokyo, Japan, Aug. 22, 2023

・A condition for the extended Shi arrangements of type A to be hereditarily free,
Combinatorics, geometry and commutative algebra of hyperplane arrangements,
Kyushu University, Fukuoka, Japan, Jan. 19, 2023

・Dimensions for extended Shi and Catalan arrangements to be hereditarily free,
Oberseminar "Arrangements and Symmetries",
Ruhr Univaersität, Bochum, Germany, Jan. 24, 2022 (online)

・Coboundary polynomials of Coxeter arrangements and Catalan arrangements,
CIMPA School, Hyperplane Arrangements: Recent Advances and Open Problems (Workshop),
Vietnam academy of science and technology, Hanoi, Vietnam, Mar. 22, 2019

・High order freeness for 3-arrangements,
On hyperplane arrangements, configuration spaces and related topics,
Hokkaido University, Sapporo, Japan, Feb. 20, 2019

・Answers to some questions for high order freeness of hyperplane arrangements,
ALTA Oberseminar,
Universität Bremen, Bremen, Germany, June 12, 2017

・A module of high order differential operators on a hyperplane arrangement,
Hyperplane arrangements and related topics,
Hokkaido University, Sapporo, Japan, Feb. 13, 2017

・Discrete Fourier transforms on some asymptotically good towers of curves,
Workshop on Hyperplane Arrangements and Singularity Theory,
Hokkaido University, Sapporo, Japan, Mar. 22, 2016

・A Decoding Algorithm for Projective Reed-Muller Codes of 2-Dimensional Projective Space with DFT,
2014 International Symposium on Information Theory and its Applications,
Melbourne, Australia, Oct. 28, 2014 (with H. Matsui) (a peer-reviewed talk)

・Construction for canonical systems of basic invariants for finite reflection groups,
New perspectives in hyperplane and reflection arrangements,
Ruhr Univaersität, Bochum, Germany, Feb. 10, 2014

・A construction for canonical systems of basic invariants for reflection groups,
2014 Joint Mathematics Meetings,
Baltimore Convention Center, Baltimore, USA, Jan. 16, 2014

・Canonical systems of basic invariants for reflection groups,
Hyperplane Arrangements and Characteristic classes,
RIMS, Kyoto University, Kyoto, Japan, Nov. 13, 2013

・Modules of Differential Operators of a Generic Hyperplane Arrangement,
The sixth China-Japan-Korea intternational conference on ring and module theory,
Kyung Hee University, Suwon, Korea, Jun. 29, 2011

・Module of differential operators of a generic hyperplane arrangement,
Interchaging day of Northeast Normal University & Hokkaido University,
An interchanging seminer of mathematics,
Northeast Normal University, Changchun, China, Nov. 12, 2010

Selected Posters

・A semigroup DFT over finite fields applied to affine variety codes,
The IEEE International Symposium on Information Theory 2015, Recent Results Poster Session,
Hong Kong Convention and Exhibition Centre, Hong Kong, June 17, 2015 (with H. Matsui)

・Bases for modules of differential operators of order 2 on the classical Coxeter arrangements,
The 24th International Conference on Formal Power Series and Algebraic Combinatorics,
Nagoya University, July 31, 2012 (a peer-reviewed presentation)

・Coxeter arrangements and Cauchy-Sylvester's compound determinants ,
The 5th Mathematical Society of Japan Seasonal Institute, 2012
International summer school and conference on Schubert calculus,
Osaka City University, July 26, 2012