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arXiv 0909.1086math.ATmath.GR
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次上同调与k-不变量

Secondary Cohomology and k-invariants

Mihai D. Staic

摘要:

对于三重$(G,A,κ)$(其中$G$是群,$A$是$G$ -模,$κ:G^3\to A$是3-上循环)和$G$ -模$B$,我们引入了一个新的上同调理论$_2H^n(G,A,κ;B)$,我们称之为次上同调.我们给出了一个构造,它使点拓扑空间$(X,x_0)$与不变量$_2κ^4\in_2H^4(π_1(X),π_2(X),κ^3;π_3(X))$相关联。这种构造可以看作是经典$k$ -不变量的“3型”推广。

英文摘要:

For a triple $(G,A,κ)$ (where $G$ is a group, $A$ is a $G$-module and $κ:G^3\to A$ is a 3-cocycle) and a $G$-module $B$ we introduce a new cohomology theory $_2H^n(G,A,κ;B)$ which we call the secondary cohomology. We give a construction that associates to a pointed topological space $(X,x_0)$ an invariant $_2κ^4\in_2H^4(π_1(X),π_2(X),κ^3;π_3(X))$. This construction can be seen a "3-type" generalization of the classical $k$-invariant.

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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