Koichi Betsumiya - researchr alias

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Viewing Publication 1 - 18 from 18

2012

A Complete Classification of Doubly Even Self-dual Codes of Length 40Koichi Betsumiya, Masaaki Harada, Akihiro Munemasa. combinatorics, 19(3):18, 2012. [doi]

On triply even binary codesKoichi Betsumiya, Akihiro Munemasa. jlms, 86(1):1-16, 2012. [doi]

2011

Hadamard matrices of order 32 and extremal ternary self-dual codesKoichi Betsumiya, Masaaki Harada, Hiroshi Kimura. dcc, 58(2):203-214, 2011. [doi]

2009

Mass Formula for Even Codes overKoichi Betsumiya, Rowena Alma L. Betty, Akihiro Munemasa. ima 2009: 65-77 [doi]

2008

Minimum Lee weights of Type II codes over ::::I::::Koichi Betsumiya. DM, 308(14):3018-3022, 2008. [doi]

2005

Codes over F::4::, Jacobi forms and Hilbert-Siegel modular forms over Q(sqrt(5))Koichi Betsumiya, YoungJu Choie. ejc, 26(5):629-650, 2005. [doi]

Ozeki Polynomials and Jacobi FormsKoichi Betsumiya, YoungJu Choie. arscom, 77, 2005.

2004

Type II codes over F::2:::m:::::+uF::2:::m:::::Koichi Betsumiya, San Ling, Fidel R. Nemenzo. DM, 275(1-3):43-65, 2004. [doi]

Optimal self-dual codes over F::2::*F::2:: with respect to the Hamming weightKoichi Betsumiya, Masaaki Harada. TIT, 50(2):356-358, 2004.

Jacobi forms over totally real fields and type II codes over Galois rings GR(2:::m:::, ::::f::::)Koichi Betsumiya, YoungJu Choie. ejc, 25(4):475-486, 2004. [doi]

2003

Formally Self-Dual Codes Related to Type II CodesKoichi Betsumiya, Masaaki Harada. aaecc, 14(2):81-88, 2003. [doi]

Extremal Self-Dual Codes over F::2:: × F::2::Koichi Betsumiya, T. Aaron Gulliver, Masaaki Harada. dcc, 28(2):171-186, 2003.

On self-dual codes over some prime fieldsKoichi Betsumiya, Stelios Georgiou, T. Aaron Gulliver, Masaaki Harada, Christos Koukouvinos. DM, 262(1-3):37-58, 2003. [doi]

2001

Classification of Formally Self-Dual Even Codes of Lengths up to 16Koichi Betsumiya, Masaaki Harada. dcc, 23(3):325-332, 2001.

Binary Optimal Odd Formally Self-Dual CodesKoichi Betsumiya, Masaaki Harada. dcc, 23(1):11-22, 2001.

Type II Codes over F::2:::r:::::Koichi Betsumiya, Masaaki Harada, Akihiro Munemasa. AAECC 2001: 102-111 [doi]

On type II codes over F::4::Koichi Betsumiya, T. Aaron Gulliver, Masaaki Harada, Akihiro Munemasa. TIT, 47(6):2242-2248, 2001.

1999

Binary Optimal Linear Rate 1/2 CodesKoichi Betsumiya, T. Aaron Gulliver, Masaaki Harada. AAECC 1999: 462-471

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