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arXiv math/0609444math.AT
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James映射的链余代数模型

A chain coalgebra model for the James map

Kathryn Hess, Paul-Eugene Parent, Jonathan Scott

摘要:

设EK是点单纯集K的单纯悬置。我们构造了James映射的链模型$α_{K} : CK \to ΩCEK$。在不假设$EK$是1-约化的情况下,我们计算了$ΩCEK$上的协棒对角线,并证明了$α_{K}$是余乘的.因此,链代数$TCK \cong ΩCK$的自然同构保持对角线。在附录中,我们表明,Milgram映射,$Ω(A \otimes B) \to ΩA \otimes ΩB$,其中A和B是coaugmented coalgebras,形成一个强形变收缩核的链复形的一部分。因此,即使A和B不是1-连通的,它也是一个链等价。

英文摘要:

Let EK be the simplicial suspension of a pointed simplicial set K. We construct a chain model of the James map, $α_{K} : CK \to ΩCEK$. We compute the cobar diagonal on $ΩCEK$, not assuming that $EK$ is 1-reduced, and show that $α_{K}$ is comultiplicative. As a result, the natural isomorphism of chain algebras $TCK \cong ΩCK$ preserves diagonals. In an appendix, we show that the Milgram map, $Ω(A \otimes B) \to ΩA \otimes ΩB$, where A and B are coaugmented coalgebras, forms part of a strong deformation retract of chain complexes. Therefore, it is a chain equivalence even when A and B are not 1-connected.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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