Existence of a codimension epsilon bifurcation set conjecture

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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 max⁡i∣ai+1−ai∣\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 s∈Us\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.

References

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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