Rchr
J-GLOBAL ID：200901036457541913
Update date: Mar. 29, 2024
Betsumiya Koichi
ベツミヤ コウイチ | Betsumiya Koichi
Affiliation and department：
Job title：
Professor
Homepage URL (1)：
http://www.st.hirosaki-u.ac.jp/~betsumi/
Research field (1)：
Algebra
Research keywords (2)：
数学
, mathematics
Research theme for competitive and other funds (6)：
Papers (23)：
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Koichi Betsumiya, Ching Hung Lam, Hiroki Shimakura. Automorphism groups of cyclic orbifold vertex operator algebras associated with the Leech lattice and some non-prime isometries. Israel Journal of Mathematics. 2023
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Koichi Betsumiya, Ching Hung Lam, Hiroki Shimakura. Automorphism Groups and Uniqueness of Holomorphic Vertex Operator Algebras of Central Charge 24. Communications in Mathematical Physics. 2022. 399. 3. 1773-1810
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Koichi Betsumiya, Mitsugu Hirasaka, Takao Komatsu, Akihiro Munemasa. Upper bounds on cyclotomic numbers. Linear Algebra and its Applications. 2013. 438. 1. 111-120
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Koichi Betsumiya, Masaaki Harada, Akihiro Munemasa. A complete classification of doubly even self-dual codes of length 40. ELECTRONIC JOURNAL OF COMBINATORICS. 2012. 19. 3. P18-+16
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Koichi Betsumiya, Akihiro Munemasa. On triply even binary codes. Journal of the London Mathematical Society. 2012. 86. 1. 1-16
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MISC (7)：
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別宮 耕一. tame 自己同型群について. 第31回有限群論草津セミナー報告集. 2020. 31. 1-3
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別宮 耕一. 拡張ハミング符号と正六百胞体との対応について. 第30回有限群論草津セミナー報告集. 2019. 30. 37-42
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別宮 耕一. Triply even code の極大性判定. 第29回有限群論草津セミナー報告集. 2018. -. 14-17
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Betsumiya Koichi. Triply even codes constructed from distance regular graphs (Research on finite groups and their representations, vertex operator algebras, and algebraic combinatorics). RIMS Kokyuroku. 2016. 2003. 2003. 66-73
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ベツミヤ コウイチ. デザイン 、 フゴウ 、 グラフ オヨビ ソノ シュウヘン : RIMS キョウドウ ケンキュウ ホウコクシュウ. 2013. 1844. 1844. 139-145
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Books (1)：
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暗号技術を支える数学 = The mathematics behind cryptography
弘前大学出版会 2020 ISBN:9784907192907
Lectures and oral presentations (25)：
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The MOG and the dodecahedron graph
(38th Algebraic Combinatorics Symposium 2022)
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Maximal triply even code を構成する組合せ構造
(Japanese Conference on Combinatorics and its Applications 2019 2019)
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A distribution of known maximal triply even codes
(Workshop on Finite Groups, VOA, and algebraic combinatorics)
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On some series of maximal triply even codes
(Workshop on Hadamard Matrices and Their Applications)
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Maximal triply even codes constructed from finite geometries
(研究集会「実験計画法と符号および関連する組合せ構造」)
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Education (3)：
- 1993 - 1999 Nagoya University Graduate School of Science PhD Course, Division of Mathematics
- 1991 - 1993 Nagoya University Graduate School of Science MSc Course, Division of Mathematics
- 1987 - 1991 Ehime University Faculty of Science Department of Mathematics
Professional career (1)：
- Ph.D. of Mathematical Scince (Kyushu University)
Work history (4)：
- 2021/10 - 現在 Hirosaki University Graduate School of Science and Technology Professor
- 2009/04 - 2021/09 Hirosaki University Graduate School of Science and Technology Associated Professor
- 2008/04 - 2009/03 Jobu University Faculty of Business Information Sciences Professor
- 2003/04 - 2008/03 Jobu University Faculty of Business Information Sciences Associate Professor
Association Membership(s) (1)：
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