2 papers
math.OC2026
Rational Minimax Approximations for Matrix-Valued Functions: Existence, Optimality and Algorithms
Lei-Hong Zhang, Chenkun Zhang
In this paper, we study rational minimax approximation for continuous complex matrix-valued functions in the Frobenius norm, where all approximant entries share a common denominato…
math.NA2026
NEP_MiniMax: An approach for NEPs based on minimax approximation of the split coefficient vector
Chenkun Zhang, Jiawei Gu, Lei-Hong Zhang
We propose \textsf{NEP\_MiniMax}, a novel computational method for solving nonlinear eigenvalue problems (NEPs) on a Jordan domain $Ω\subset \mathbb{C…