Abstract
Necessity: if an operator commutes with each entry of the matrix, then it commutes with each entry of the inverse. Sufficiency: use Cramer’s rule.
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© 1982 Springer-Verlag New York Inc.
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Halmos, P.R. (1982). Operator Matrices. In: A Hilbert Space Problem Book. Graduate Texts in Mathematics, vol 19. Springer, New York, NY. https://doi.org/10.1007/978-1-4684-9330-6_33
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DOI: https://doi.org/10.1007/978-1-4684-9330-6_33
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4684-9332-0
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