Abstract
In a separable complex Hilbert space endowed with an isometric conjugate-linear involution, we study sequences orthonormal with respect to an associated bilinear form. Properties of such sequences are measured by a positive, possibly unbounded angle operator which is formally orthogonal as a matrix. Although developed in an abstract setting, this framework is relevant to a variety of eigenvector interpolation problems arising in function theory and in the study of differential operators.
Citation
Stephan R. Garcia. Mihai Putinar. "Interpolation and complex symmetry." Tohoku Math. J. (2) 60 (3) 423 - 440, 2008. https://doi.org/10.2748/tmj/1223057737
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