Abstract
For an 2 × 2 operator matrix \( M_X \left( {\begin{array}{*{20}c} A & C \\ X & B \\ \end{array} } \right) \) on the Hilbert space H ⊞ K, if A, B and C are given, we study the intersection and the union of the spectra of all M x when X is taken over B(H, K).
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© 1993 Springer Basel AG
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Du, HK., Gu, C. (1993). On The Spectra of Operator Completion Problems. In: Gohberg, I. (eds) New Aspects in Interpolation and Completion Theories. Operator Theory Advances and Applications, vol 64. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8562-1_5
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DOI: https://doi.org/10.1007/978-3-0348-8562-1_5
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-0348-9681-8
Online ISBN: 978-3-0348-8562-1
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