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Stiefel filters https://arxiv.org/abs/2411.04146 #mathCV

Stiefel filters

The best uniform rational approximation of the Sign function on two intervals separated by zero was explicitly found by E.I. Zolotarëv in 1877. The natural extension of this problem to three bands was solved by E.Stiefel in 1961. We indicate the solutions overlooked by the prominent geometer and study their properties.

arXiv.org
November 9, 2024 at 3:10 AM · · feed2toot · 0 · 0 · 0
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