Berger–Rovella inverse-limit stability conjecture for endomorphisms

Let ff be an endomorphism, with inverse limit space Mf\overleftarrow M_f and natural extension f\overleftarrow f. It is C1C^1-inverse limit stable if every C1C^1 perturbation ff' admits a homeomorphism h:MfMfh:\overleftarrow M_f\to\overleftarrow M_{f'} such that hf=fhh\circ\overleftarrow f=\overleftarrow f'\circ h. An axiom A endomorphism satisfies the weak transversality condition if, for every xΩf\underline{x}\in\overleftarrow\Omega_f and every yΩfy\in\Omega_f, the map π0Wu(x;f)\pi_0|W^u(\underline{x};\overleftarrow f) is transverse to Wϵs(y;f)W^s_\epsilon(y;f). Berger–Rovella conjecture. The C1C^1-inverse limit stable endomorphisms are those which satisfy axiom A and the weak transversality condition. The source says that one direction was proved in the cited work and that the other direction remains open.

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Primary source

Pierre Berger, “Lectures on Structural Stability in Dynamics”, arXiv:1703.00092 (2017).

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