Abstract
Several extensions of Loewner's theory of monotone operator functions are given. These include a theorem on boundary interpolation for matrix-valued functions in the generalized Nevanlinna class. The theory of monotone operator functions is generalized from scalar- to matrix-valued functions of an operator argument. A notion of κ-monotonicity is introduced and characterized in terms of classical Nevanlinna functions with removable singularities on a real interval. Corresponding results for Stieltjes functions are presented.
Original language | English |
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Pages (from-to) | 1-20 |
Number of pages | 20 |
Journal | Journal of Functional Analysis |
Volume | 189 |
Issue number | 1 |
DOIs | |
State | Published - 20 Feb 2002 |
ASJC Scopus subject areas
- Analysis