The topological exactness conjecture for hard telic problems

Let (X,T)(X,T) be an efficiently discretizable topological dynamical system. Recall that TT is topologically exact if, for every nonempty open set UXU\subset X, there exists n0Nn_0\in\mathbb{N} such that Tn0(U)=XT^{n_0}(U)=X. A telic problem is called hard-on-average when it satisfies the stated almost-everywhere average-case hardness condition.

Topological exactness conjecture. If TT is topologically exact and the system admits a hard telic problem, then there exists an almost-everywhere δ\delta hard-on-average telic problem coming from the dynamical system.

The conjecture is motivated by the possible construction of one-way functions from dynamical systems with hard telic problems. Its resolution is not supplied in the source.

Sources & referencesView supporting material

Primary source

Samuel Everett, “Correspondences in computational and dynamical complexity I”, arXiv:2601.09109 (2026).

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