Ohsugi Hidefumi

オオスギヒデフミ | Ohsugi Hidefumi

Affiliation and department：
Job title： Professor
Homepage URL (1)： https://sci-tech.ksc.kwansei.ac.jp/~hohsugi/

Research field (3)： Applied mathematics and statistics , Basic mathematics , Algebra

Research keywords (5)： convex polytopes , toric ideals , Grobner bases , combinatorics , commutative algebra

Research theme for competitive and other funds (19)：

2021 - 2026 Challenge towards the open problems in the theory of lattice polytopes by algebraic and combinatorial methods
2018 - 2023 離散幾何的な新概念とグレブナー基底理論の融合による凸多面体論における新手法の開発
2012 - 2017 対称性を持つ構成法で構成された配置のトーリック環の構造解析
2010 - 2015 Study on open problems arising from convex polytopes with strategies of the developed theory of Groebner bases
2010 - 2014 Developments of mathematical statistics through computational algebraic methods

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Papers (71)：

Hidefumi Ohsugi, Akiyoshi Tsuchiya. PQ-Type Adjacency Polytopes of Join Graphs. Discrete and Computational Geometry. 2023. 70. 1. 214-235
Hidefumi Ohsugi, Kazuki Shibata, Akiyoshi Tsuchiya. Perfectly contractile graphs and quadratic toric rings. Bulletin of the London Mathematical Society. 2023. 55. 3. 1264-1274
Takayuki Hibi, Aki Mori, Hidefumi Ohsugi. The number of 4-cycles and the cyclomatic number of a finite simple graph. Australasian Journal of Combinatorics. 2023. 85. 15-34
Satoshi Murai, Hidefumi Ohsugi, Kohji Yanagawa. A note on the reducedness and Grobner bases of Specht ideals. COMMUNICATIONS IN ALGEBRA. 2022. 50. 12. 5430-5434
Akihiro Higashitani, Hidefumi Ohsugi. Quadratic Gröbner bases of block diagonal matching field ideals and toric degenerations of Grassmannians. Journal of Pure and Applied Algebra. 2022. 226. 2

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MISC (14)：

Hidefumi Ohsugi, Akiyoshi Tsuchiya. Kempe equivalence and quadratic toric rings. 2023
Hidefumi Ohsugi, Kohji Yanagawa. Gröbner fans of Specht ideals. 2022
Aoki Satoshi, Ohsugi Hidefumi, Hibi Takayuki. Markov chain Monte Carlo methods for the regular two-level fractional factorial designs and cut ideals (Designs, Codes, Graphs and Related Areas). RIMS Kokyuroku. 2014. 1889. 42-51
Hidefumi Ohsugi. Convex polytopes and Gröbner bases. Gröbner Bases: Statistics and Software Systems. 2013. 9784431545743. 223-278
大杉英史. "素手"で計算するグレブナー基底 (特集グレブナー基底の新天地). 数学セミナー. 2012. 51. 2. 20-24

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Books (4)：

Lectures and oral presentations (13)：

Toric ideals of nested configurations
(Special session on Algebra & Number Theory with Polyhedra (Western Section AMS Meeting) 2009)
Edge polytopes and some examples
(Combinatorial challenges in toric varieties 2009)
Simple Polytopes Arising from Finite Graphs
(INFORMATION-THEORETIC ASPECTS OF INTEGER-POINT ENUMERATION IN POLYHEDRA 2008)
Smooth edge polytopes
(Projective Normality of Smooth Toric Varieties 2007)
Groebner bases of toric ideals
(Efficient Computation of Groebner bases and Mathematical Algorithms Based on It 2006)

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Education (2)：

Professional career (1)：

Work history (9)：

2021/04 - 現在 Kwansei Gakuin University Department of Mathematical Sciences, School of Science Professor
2014/04 - 2021/03 Kwansei University Department of Mathematical Sciences, School of Science and Technology Professor
2012/04 - 2014/03 Rikkyo University College of Science Department of Mathematics Professor
2007/04 - 2012/03 Rikkyo University College of Science Department of Mathematics Associate Professor
2005/04 - 2007/03 Rikkyo University College of Science Department of Mathematics Associate Professor (as old post name)

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Committee career (1)：

Association Membership(s) (1)：

THE MATHEMATICAL SOCIETY OF JAPAN

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