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math.AT2019★ 2 cited
A remark on the Mayer-Vietoris double complex for singular cohomology
Roberto Frigerio, Andrea Maffei
Given an open cover of a paracompact topological space X, there are two natural ways to construct a map from the cohomology of the nerve of the cover to the cohomology of X. One of…
math.AT2019
Amenable covers and l^1-invisibility
Roberto Frigerio
Let be a topological space admitting an amenable cover of multiplicity . We show that, for every and every , the image of …