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- W2951761630 abstract "We define Peano covering maps and prove basic properties analogous to classical covers. Their domain is always locally path-connected but the range may be an arbitrary topological space. One of characterizations of Peano covering maps is via the uniqueness of homotopy lifting property for all locally path-connected spaces. Regular Peano covering maps over path-connected spaces are shown to be identical with generalized regular covering maps introduced by Fischer and Zastrow. If $X$ is path-connected, then every Peano covering map is equivalent to the projection $widetilde X/Hto X$, where $H$ is a subgroup of the fundamental group of $X$ and $widetilde X$ equipped with the basic topology. The projection $widetilde X/Hto X$ is a Peano covering map if and only if it has the unique path lifting property. We define a new topology on $widetilde X$ for which one has a characterization of $widetilde X/Hto X$ having the unique path lifting property if $H$ is a normal subgroup of $pi_1(X)$. Namely, $H$ must be closed in $pi_1(X)$. Such groups include $pi(mathcal{U},x_0)$ ($mathcal{U}$ being an open cover of $X$) and the kernel of the natural homomorphism from the fundamental group to the Cech fundamental group." @default.
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- W2951761630 date "2008-01-31" @default.
- W2951761630 modified "2023-09-27" @default.
- W2951761630 title "Covering maps for locally path-connected spaces" @default.
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