Freedman's controlled Mather–Thurston conjecture

From papers

Let (V,V)(V,\partial V) be a manifold with dim(V)3\dim(V)\geq 3. Let XBVX\hookrightarrow B\to V be a bundle with structure group Homeo(X)\operatorname{Homeo}(X), where XX is a manifold with a point-set metric, and suppose the bundle has near V\partial V a topologically flat connection F0\mathcal{F}_0 whose holonomy lies in Iso(X)\operatorname{Iso}(X). Let NN be any norm-topology neighborhood of Iso(X)\operatorname{Iso}(X) in Homeo(X)\operatorname{Homeo}(X). Freedman's controlled Mather–Thurston conjecture. There exists a one-sided ss-cobordism (W,V,V)(W,V,V^{\ast}), constant near V\partial V, covered by a bundle B\overline{B} with structure group Homeo0(X)\operatorname{Homeo}_{0}(X) to a bundle XBVX\hookrightarrow B^{\ast}\to V^{\ast} possessing a topologically flat connection inducing a representation ρ:π1(V)Homeo(X)\rho:\pi_1(V^{\ast})\to\operatorname{Homeo}(X) such that ρ(S)N\rho(S)\subset N for some generating set SS for π1(V)\pi_1(V^{\ast}). The conjecture is proposed as an extension of Freedman's result; the source does not establish it in the stated generality.

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Sources & referencesView supporting material

Primary source

Shijie Gu, “On Z-compactifiability of manifolds”, arXiv:2312.02527 (2024).

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