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Ternary self-dual codes have been classified for lengths up to 20. At length 24, a classification of only extremal self-dual codes is known. In this paper, we give a complete classification of ternary self-dual codes of length 24 using the…

组合数学 · 数学 2012-05-28 Masaaki Harada , Akihiro Munemasa

A complete classification of binary doubly even self-dual codes of length 40 is given. As a consequence, a classification of binary extremal self-dual codes of length 38 is also given.

组合数学 · 数学 2012-11-13 Koichi Betsumiya , Masaaki Harada , Akihiro Munemasa

A complete classification of binary self-dual codes of length 36 is given.

组合数学 · 数学 2012-11-13 Masaaki Harada , Akihiro Munemasa

In this note, we give basic properties of ternary four-negacirculant self-dual codes. By exhaustive computer search based on the properties, we complete a classification of ternary extremal four-negacirculant self-dual codes of lengths 40,…

组合数学 · 数学 2023-06-21 Masaaki Harada , Keita Ishizuka , Hadi Kharaghani

We give restrictions on the weight enumerators of ternary near-extremal self-dual codes of length divisible by $12$ and quaternary near-extremal Hermitian self-dual codes of length divisible by $6$. We consider the weight enumerators for…

信息论 · 计算机科学 2022-12-05 Makoto Araya , Masaaki Harada

Hermitian linear complementary dual codes are linear codes whose intersection with their Hermitian dual code is trivial. The largest minimum weight among quaternary Hermitian linear complementary dual codes of dimension $2$ is known for…

组合数学 · 数学 2020-04-21 Keita Ishizuka

An efficient algorithm for classification of binary self-dual codes is presented. As an application, a complete classification of the self-dual codes of length 38 is given.

组合数学 · 数学 2012-10-10 Stefka Bouyuklieva , Iliya Bouyukliev

All binary self-dual [44,22,8] codes with an automorphism of order 3 or 7 are classified. In this way we complete the classification of extremal self-dual codes of length 44 having an automorphism of odd prime order.

组合数学 · 数学 2015-03-13 Stefka Bouyuklieva , Nikolay Yankov , Radka Russeva

We give a complete classification of binary linear complementary dual codes of lengths up to $13$ and ternary linear complementary dual codes of lengths up to $10$.

组合数学 · 数学 2020-11-20 Makoto Araya , Masaaki Harada

Ternary maximal self-orthogonal codes have been classified for lengths up to $24$. In this note, we provide a complete classification of ternary maximal self-orthogonal codes of length $25$.

信息论 · 计算机科学 2026-05-14 Makoto Araya , Masaaki Harada

In this paper, binary extremal singly even self-dual codes of length 40 and extremal odd unimodular lattices in dimension 40 are studied. We give a classification of extremal singly even self-dual codes of length 40. We also give a…

组合数学 · 数学 2013-02-19 Stefka Bouyuklieva , Iliya Bouyukliev , Masaaki Harada

We consider additive codes over GF(4) that are self-dual with respect to the Hermitian trace inner product. Such codes have a well-known interpretation as quantum codes and correspond to isotropic systems. It has also been shown that these…

组合数学 · 数学 2008-01-09 Lars Eirik Danielsen , Matthew G. Parker

In this short note, we report the classification of self-dual $\mathbb{Z}_k$-codes of length $n$ for $k \le 24$ and $n \le 9$.

组合数学 · 数学 2017-10-20 Masaaki Harada , Akihiro Munemasa

In this paper we classify all extremal and $s$-extremal binary self-dual codes of length 38. There are exactly 2744 extremal $[38,19,8]$ self-dual codes, two $s$-extremal $[38,19,6]$ codes, and 1730 $s$-extremal $[38,19,8]$ codes. We obtain…

离散数学 · 计算机科学 2011-11-02 Carlos Aguilar-Melchor , Philippe Gaborit , Jon-Lark Kim , Lin Sok , Patrick Solé

A classification of extremal double circulant self-dual codes of lengths up to $88$ is known. We give a classification of extremal double circulant self-dual codes of lengths $90,92,94$ and $96$. We also classify double circulant self-dual…

组合数学 · 数学 2017-03-22 T. Aaron Gulliver , Masaaki Harada

In this work, we give three new techniques for constructing Hermitian self-dual codes over commutative Frobenius rings with a non-trivial involutory automorphism using $\lambda$-circulant matrices. The new constructions are derived as…

组合数学 · 数学 2023-01-18 Adam Michael Roberts

Additive codes over GF(9) that are self-dual with respect to the Hermitian trace inner product have a natural application in quantum information theory, where they correspond to ternary quantum error-correcting codes. However, these codes…

组合数学 · 数学 2012-07-24 Lars Eirik Danielsen

In this work, we generalize the four circulant construction for self-dual codes. By applying the constructions over the alphabets F_2, F_2 + uF_2, F_4+uF_4, we were able to obtain extremal binary self-dual codes of lengths 40, 64 including…

组合数学 · 数学 2019-12-30 Joe Gildea , Abidin Kaya , Bahattin Yildiz

We introduce quaternary modified four $\mu$-circulant codes as a modification of four circulant codes. We give basic properties of quaternary modified four $\mu$-circulant Hermitian self-dual codes. We also construct quaternary modified…

信息论 · 计算机科学 2024-01-30 Masaaki Harada

We give a classification of four-circulant singly even self-dual $[60,30,d]$ codes for $d=10$ and $12$. These codes are used to construct extremal singly even self-dual $[60,30,12]$ codes with weight enumerator for which no extremal singly…

组合数学 · 数学 2020-11-20 Masaaki Harada
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