Terrace
发表于 2025-3-30 11:16:27
Y. Cherruaultosed normal subgroups have finite index. Just infinite groups have arisen in a variety of contexts. The abstract just infinite groups having non-trivial abelian normal subgroups are precisely the space groups whose point groups act rationally irreducibly on the abelian normal subgroups (see McCarthy
抓住他投降
发表于 2025-3-30 14:23:47
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faultfinder
发表于 2025-3-30 18:25:14
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inflame
发表于 2025-3-30 22:47:46
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