Upper triangular operator matrices and stability of their various spectra

2021/10/14 by Sarajlija, Nikola · 1 citation
#47A10 47A05 47A53 #FOS: Mathematics #Functional Analysis (math.FA)

paper · doi:10.48550/arxiv.2110.07387

Abstract

Denote by T_n^d(A) an upper triangular operator matrix of dimension n whose diagonal entries D_i are known, where A=(A_ij)_1≤ i

Cited by

• Invertible completions of FLI and FRI upper triangular operator matrices

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• Intersections of various spectra of operator matrices
• Perturbing the spectrum of operator T_n^d(A)
• Upper semi-Weyl and upper semi-Browder spectra of unbounded upper triangular operator matrices
• Invertibility properties of operator matrices on Hilbert spaces
• Upper triangular Toeplitz matrices and real parts of quasinilpotent operators