Theorem IsIdempotentElem.spectrum_subset

Modification history

2025-07-26 16:23
Mathlib/FieldTheory/IsAlgClosed/Spectrum.lean
feat(Analysis/CStarAlgebra/...): an idempotent element in a C*-algebra is self-adjoint iff it is normal (#27475)
Added IsIdempotentElem.spectrum_subsetView on Github →