Existence of a codimension epsilon bifurcation set conjecture

Let ff be a mapping (neural network) with sufficiently high dimension dd, and let UU be a bifurcation chain set as in the hyperbolicity violation conjecture. The existence of a codimension-ϵ\epsilon bifurcation set conjecture asserts the following equivalent statements: (i) in the infinite-dimensional limit, the cardinality of UU tends to infinity and maxiai+1ai\max_i|a_{i+1}-a_i| tends to zero on a one-dimensional parameter interval, so that UU is aa-dense in its closure U\overline{U}; (ii) in the asymptotic high-dimensional limit, for every sUs\in U and every ff at ss, an arbitrarily small perturbation δs\delta_s of ss produces a topological change corresponding to a different number of global stable and unstable manifolds for ff at ss and at s+δs+\delta. The claim is presented as a framework for computational verification of hyperbolicity violation, while the supplied text gives no resolution.

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Primary source

D. J. Albers and J. C. Sprott, “Structural Stability and Hyperbolicity Violation in High-Dimensional Dynamical Systems”, arXiv:nlin/0408011 (2004).

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