A note on Weyl spectra of upper-triangular operator matrices

Haiyan Zhang

Abstract


Let M_C be a 2 x 2 upper triangular operator matrix acting on the Hilbert space H + K. In this paper, for given operators A and B, we give a new characterization of ∩_{C∈B(K,H) σ_w(M_C), whereσ_w(A) denote the Weyl spectrum of A.

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How to Cite this Article:

Haiyan Zhang, A note on Weyl spectra of upper-triangular operator matrices, Journal of Mathematical and Computational Science, Vol 5, No 3 (2015), 273-279

Copyright © 2015 Haiyan Zhang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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