Hyperbolic continuation of high-entropy homoclinic classes
Let be a diffeomorphism of a compact surface. For , let be the set of homoclinic classes of measures satisfying . Let converge in the topology. For a homoclinic class of , its hyperbolic continuation under a nearby diffeomorphism is the homoclinic class containing all ergodic hyperbolic measures of homoclinically related to the hyperbolic continuation of a periodic orbit with . Continuation conjecture. Fix . If for all large , then, for all large , each homoclinic class in is the hyperbolic continuation of some homoclinic class in . This conjecture refines upper semicontinuity by asserting that equality of the numbers of high-entropy classes forces every perturbed class to arise by continuation from an original one.
References
Primary source
Jérôme Buzzi, Chiyi Luo and Dawei Yang, “Continuity properties of ergodic measures of maximal entropy for C^r surface diffeomorphisms”, arXiv:2412.19658 (2025).
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