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An Axiomatic Characterization of Steenrod's cup-$i$ Products. (arXiv:1810.06505v1 [math.AT])

来源于:arXiv
We present axioms that determine the cup-$i$ products introduced explicitly by Steenrod up to isomorphism, and not just homotopy. As is well known, these products generalize the Alexander-Whitney cup product on cochains and induce the Steenrod squares in cohomology. 查看全文>>