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Symmetry Codes and Their Invariant Subcodes
(1974-02)
We define and study the invariant subcodes of the symmetry codes in order to be able to determine the algebraic properties of these codes. An infinite family of self-orthogonal rate 1/2 codes over GF (3), called symmetry ...
Complete Classification of (24,12) and (22,11) Self-dual Codes
(1974-06)
A complete classification is given of all [22, 11] and [24, 12] self-dual codes. For each code we give the order of its group, the number of codes equivalent to it, and its weight distribution. There is a unique [24, 12, ...