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Some designs and codes invariant under the groups S 9 and A 8

机译:S 9 和A 8 组下的一些设计和代码不变

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We examine some designs and binary codes constructed from the primitive permutation representations of the groups PSL 2(8) and PSL 2(9). For PSL 2(8) of degree 36, we construct a design and its code with the automorphism groups PSL 2(8) and S 9, respectively. For PSL 2(8) of degree 36 and PSL 2(9) of degree 15, we construct some designs and its codes invariant under the groups S 9 and A 8, respectively. The weight distribution and the dual of these codes are determined. By considering the action of automorphism groups on some of these codes, we obtain the structure of the stabilizer for every codeword and construct some designs such that S 9 or A 8 act primitively on them.
机译:我们检查了由组PSL 2 (8)和PSL 2 (9)的原始置换表示构造的一些设计和二进制代码。对于度为36的PSL 2 (8),我们构造了具有同构组PSL 2 (8)和S 9 的设计及其代码, 分别。对于等级36的PSL 2 (8)和等级15的PSL 2 (9),我们构造了一些设计及其代码在S 9 < / sub>和A 8 。确定这些代码的权重分布和对偶。通过考虑自同构群对其中一些代码的作用,我们获得了每个代码字的稳定器结构,并构建了一些设计,使得S 9 或A 8 最初起作用在他们。

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