Spectra of the difference, sum and product of idempotents

DOI10.4064/sm148-1-1zbMath0999.47003OpenAlexW2025109642MaRDI QIDQ2773387

Mohamed Boumazgour, Mohamed Barraa

Publication date: 21 February 2002

Published in: Studia Mathematica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.4064/sm148-1-1

zbMATH Keywords

Banach algebraquadratic elementpair of idempotents

Mathematics Subject Classification ID

Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product) (46C05) Hermitian and normal operators (spectral measures, functional calculus, etc.) (47B15) Spectrum, resolvent (47A10)

Related Items (5)

A gentle guide to the basics of two projections theory ⋮ Jordan form of the difference of projectors ⋮ On the spectra of products and linear combinations of idempotents ⋮ A note about the norm of the sum and the anticommutator of two orthogonal projections ⋮ Invariant subspaces of idempotents on Hilbert spaces

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