Block probing and zooming-in make resolvent-polefinding for nonlinear eigenproblems accurate and multiplicity-aware, with proved rates and stable barycentric rootfinding.
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Convergence analysis of a nonlinear eigensolver based on rational approximation of the resolvent
Block probing and zooming-in make resolvent-polefinding for nonlinear eigenproblems accurate and multiplicity-aware, with proved rates and stable barycentric rootfinding.