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词汇 Crossed module
分类 英语词汇 英语翻译词典
释义

Crossed module

英语百科

Crossed module

In mathematics, and especially in homotopy theory, a crossed module consists of groups G and H, where G acts on H by automorphisms (which we will write on the left, (g,h) \mapsto g \cdot h ), and a homomorphism of groups

that is equivariant with respect to the conjugation action of G on itself:

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