Extension of the Lyapunov-map theorem to heterodimensional cycles

Let Λ\Lambda be a heterodimensional cycle linking saddles PP and QQ. Let II contain 00, dd, and the indices of dominated splittings on Λ\Lambda, and let μ\mu and σ\sigma be the Lyapunov maps of the Dirac measures at PP and QQ. For 0λ10\leq\lambda\leq 1, set

τλ=λμ+(1λ)σ.\tau_\lambda=\lambda\mu+(1-\lambda)\sigma.

A convex Lyapunov map τ\tau is admissible when ττλ\tau\geq\tau_\lambda and agrees with τλ\tau_\lambda at every index in II.

Heterodimensional-cycle extension conjecture. Theorem on possible limit Lyapunov maps for a homoclinic tangency still works if one replaces the homoclinic tangency by a heterodimensional cycle.

The claim predicts that the characterization and generic realization of limit Lyapunov maps proved for homoclinic tangencies extends to heterodimensional cycles. The source gives no resolution.

Sources & referencesView supporting material

Primary source

Nicolas Gourmelon, “Steps towards a classification of C^r-generic dynamics close to homoclinic points”, arXiv:1410.1758 (2014).

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