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math.CO2014
On a 5-design related to a putative extremal doubly even self-dual code of length a multiple of 24
Masaaki Harada
By the Assmus and Mattson theorem, the codewords of each nontrivial weight in an extremal doubly even self-dual code of length 24m form a self-orthogonal 5-design. In this paper, w…
math.CO2014
Note on the residue codes of self-dual -codes having large minimum Lee weights
Masaaki Harada
It is shown that the residue code of a self-dual -code of length (resp.\ ) and minimum Lee weight (resp.\ )…