spectral set

Fetched 2026-10-26 (cache).

Synonyms: spectralist, spectral bat

Antonyms: spectralist, spectral bat

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|math}} In [[operator theory]], a set <math>X\subseteq\mathbb{C}</math> such that, for a (possibly unbounded) linear operator <math>T</math> on a [[Banach space]], the [[spectrum]] of <math>T</math> is in <math>X</math> and [[von Neumann's inequality]] holds for <math>T</math> on <math>X</math>.

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