Univalence or typical reality of the multiplier function

From papers

Let NN and TT be positive integers, and let Φ(z)\Phi(z) be the function constructed from the stabilization polynomials and the parameter γ\gamma.

Univalence conjecture. For any NN and TT there is a choice of γ\gamma such that the function Φ(z)\Phi(z) is univalent or typically real in D\mathbb D. The largest value of γ\gamma is a point of interest, since it produces the widest region for the multipliers.

If Φ\Phi is univalent or typically real, then its boundary image has only the two intersections with the real axis at Φ(1)=1\Phi(1)=1 and Φ(1)\Phi(-1). This would yield estimates for the optimization problem and enlarge the region of multipliers for which the closed-loop system has a stable TT-cycle. The source gives no resolution of the conjecture.

Progress summary

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Sources & referencesView supporting material

Primary source

D. Dmitrishin, I. E. Iacob, I. Skrinnik and A. Stokolos, “Finding, Stabilizing, and Verifying Cycles of Nonlinear Dynamical Systems”, arXiv:1712.06035 (2017).

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