Conjecture on weak omega-limit sets of Volterra quadratic stochastic operators

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Let V∈V~−V\in\tilde{\mathcal V}^- and let f(V)=(aki)\frak{f}(V)=(a_{ki}). For x∈S{\mathbf{x}}\in S, write supp⁡(x)\operatorname{supp}({\mathbf{x}}) for its support, let ej{\mathbf e}_j denote the jj-th unit vector, and let 0{\mathbf 0} denote the zero vector. Assume that aki<0a_{ki}<0 for all k<ik<i. Weak omega-limit set conjecture. For every x∈S{\mathbf{x}}\in S:

  1. if ∣supp⁡(x)∣<∞|\operatorname{supp}({\mathbf{x}})|<\infty, then
ωV(w)(x)={emax⁡{supp⁡(x)}};\omega_V^{(w)}({\mathbf{x}})=\left\{{\mathbf e}_{\max\{\operatorname{supp}({\mathbf{x}})\}}\right\};
  1. if ∣supp⁡(x)∣=∞|\operatorname{supp}({\mathbf{x}})|=\infty, then
ωV(w)(x)={0}.\omega_V^{(w)}({\mathbf{x}})=\left\{{\mathbf 0}\right\}.

This conjecture predicts the weak asymptotic behavior of Volterra quadratic stochastic operators with strictly negative coefficients above the diagonal: finite-support points converge weakly to the unit vector indexed by their largest support index, whereas infinite-support points converge weakly to the zero vector. The input supplies no evidence resolving the conjecture, so its status remains open.

References

Primary source

Farrukh Mukhamedov, Otabek Khakimov and Ahmad Fadillah Embong, “On omega limiting sets of infinite dimensional Volterra operators”, arXiv:1909.04285 (2019).

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