arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2010.02571math.AT
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上链水平May-Steenrod操作

Cochain level May-Steenrod operations

Ralph M. Kaufmann, Anibal M. Medina-Mardones

摘要:

斯廷罗德在1947年定义的斯廷罗德平方模2上同调的空间使用明确的cochain公式的杯- $i$产品;一个家庭的连贯同伦来自破碎对称的亚历山大-惠特尼链近似对角线。他后来定义了他的homomorphic业务的所有素数使用的同源性的对称群。这种方法加强了对行动的概念理解,并取得了许多进展,但缺乏在最佳时期对其定义的具体性。近年来,由于上同调的新应用的发展,需要有一个有效的可计算的定义Steenrod操作已成为一个关键问题。使用五月的操作的观点,本文提供了这样的定义,在所有素数引入多个操作,推广的Steenrod杯$i$产品的单纯和立方上链的空间。

英文摘要:

Steenrod defined in 1947 the Steenrod squares on the mod 2 cohomology of spaces using explicit cochain formulae for the cup-$i$ products; a family of coherent homotopies derived from the broken symmetry of Alexander--Whitney's chain approximation to the diagonal. He later defined his homonymous operations for all primes using the homology of symmetric groups. This approach enhanced the conceptual understanding of the operations and allowed for many advances, but lacked the concreteness of their definition at the even prime. In recent years, thanks to the development of new applications of cohomology, the need to have an effectively computable definition of Steenrod operations has become a key issue. Using the operadic viewpoint of May, this article provides such definitions at all primes introducing multioperations that generalize the Steenrod cup-$i$ products on the simplicial and cubical cochains of spaces.

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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