Duality in spectral optimization and numerical ranges of a family of self-adjoint operators
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One gives results which complement the author's investigation, published in Dokl. Akad. Nauk SSSR,255, No. 4, 777–780 (1980). One establishes the relationship of the fundamental condition ensuring the duality relation between the direct and the dual problems in spectral optimization problems with the geometry of the numerical ranges of certain families of self-adjoint operators.
KeywordsNauk SSSR Dual Problem Duality Relation Numerical Range Fundamental Condition
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