Mass formula for self-orthogonal codes over Zp2

Abstract

In this note, we establish a mass formula for self-orthogonal codes over Zp2, where p is a prime. As a consequence, an alternative proof of the known mass formulas for self-dual codes over Zp2 is obtained. We also establish a mass formula for even quaternary codes, which includes a mass formula for Type II quaternary codes as a special case.

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