96 citations · 292 across the 62 of their papers we have counts for
9 papers · 1 filter
Classification of quaternary Hermitian self-dual codes of length 20
Masaaki Harada, Akihiro Munemasa
A classification of quaternary Hermitian self-dual codes of length 20 is given. Using this classification, a classification of extremal quaternary Hermitian self-dual codes of leng…
Classification of self-dual codes of length 36
Masaaki Harada, Akihiro Munemasa
A complete classification of binary self-dual codes of length 36 is given.
On triply even binary codes
Koichi Betsumiya, Akihiro Munemasa
A triply even code is a binary linear code in which the weight of every codeword is divisible by 8. We show how two doubly even codes of lengths m_1 and m_2 can be combined to make…
On the classification of weighing matrices and self-orthogonal codes
Masaaki Harada, Akihiro Munemasa
We provide a classification method of weighing matrices based on a classification of self-orthogonal codes. Using this method, we classify weighing matrices of orders up to 15 and…
Spin models constructed from Hadamard matrices
Takuya Ikuta, Akihiro Munemasa
A spin model (for link invariants) is a square matrix which satisfies certain axioms. For a spin model , it is known that is a permutation matrix, and its order…
Hamming graphs in Nomura Algebras
Ada Chan, Akihiro Munemasa
Let A be an association scheme on q\geq 3 vertices. We show that the Bose-Mesner algebra of the generalized Hamming scheme H(n,A), for n\geq 2, is not the Nomura algebra of a type…