Freedman's controlled Mather–Thurston conjecture

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Let (V,∂V)(V,\partial V) be a manifold with dim⁡(V)≥3\dim(V)\geq 3. Let X↪B→VX\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 Homeo⁡0(X)\operatorname{Homeo}_{0}(X) to a bundle X↪B∗→V∗X\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.

References

Primary source

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

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