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07/18/2023
Hadamard matrices of orders 60 and 64 with automorphisms of orders 29 and 31
A classification of Hadamard matrices of order 2p+2 with an automorphism...
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06/18/2023
Ternary extremal four-negacirculant self-dual codes
In this note, we give basic properties of ternary four-negacirculant sel...
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12/02/2022
Some restrictions on the weight enumerators of near-extremal ternary self-dual codes and quaternary Hermitian self-dual codes
We give restrictions on the weight enumerators of ternary near-extremal ...
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08/07/2022
Self-dual codes over 𝔽_5 and s-extremal unimodular lattices
New s-extremal extremal unimodular lattices in dimensions 38, 40, 42 and...
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05/31/2022
Hadamard matrices related to a certain series of ternary self-dual codes
In 2013, Nebe and Villar gave a series of ternary self-dual codes of len...
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01/05/2022
Construction of extremal Type II ℤ_2k-codes
We give methods for constructing many self-dual ℤ_m-codes and Type II ℤ_...
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01/28/2021
Construction of binary LCD codes, ternary LCD codes and quaternary Hermitian LCD codes
We give two methods for constructing many linear complementary dual (LCD...
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11/09/2020
On the classification of quaternary optimal Hermitian LCD codes
We propose a method for a classification of quaternary Hermitian LCD cod...
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04/11/2020
On the existence of s-extremal singly even self-dual codes
We construct new s-extremal singly even self-dual codes of minimum weigh...
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12/05/2019
Construction of s-extremal optimal unimodular lattices in dimension 52
An s-extremal optimal unimodular lattice in dimension 52 is constructed ...
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08/23/2019
Remark on subcodes of linear complementary dual codes
We show that any ternary Euclidean (resp. quaternary Hermitian) linear c...
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08/23/2019
On the minimum weights of ternary linear complementary dual codes
It is a fundamental problem to determine the largest minimum weight d_3(...
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08/01/2019
Existence of some optimal maximal entanglement entanglement-assisted quantum codes
We establish the existence of optimal maximal entanglement entanglement-...
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04/16/2019
Quaternary Hermitian linear complementary dual codes
The largest minimum weights among quaternary Hermitian linear complement...
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02/23/2019
New doubly even self-dual codes having minimum weight 20
In this note, we construct new doubly even self-dual codes having minimu...
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07/10/2018
On the minimum weights of binary linear complementary dual codes
Linear complementary dual codes (or codes with complementary duals) are ...
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05/30/2018
New quantum codes constructed from some self-dual additive F_4-codes
For (n,d)= (66,17),(78,19) and (94,21), we construct quantum [[n,0,d]] c...
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04/06/2018
Singly even self-dual codes of length 24k+10 and minimum weight 4k+2
Currently, the existence of an extremal singly even self-dual code of le...
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03/30/2018
On the classification of linear complementary dual codes
We give a complete classification of binary linear complementary dual co...
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02/20/2018