Open Research Index

lean-operator-theory

Ezzeri Esa

Palomar Registrypalomar/PALOMAR-2026-09-01-000002Sep 1, 2026math.FAscore 0

Hilbert-space operator theory from unitary power dilation through von Neumann's polynomial inequality, together with the Crouzeix--Palencia theorem that the closed numerical range is a (1 + square-root-of-2)-polynomial spectral set.

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