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Displaying 21 – 38 of 38

On the Kreĭn-Langer integral representation of generalized Nevanlinna functions.

Rovnyak, J., Sakhnovich, L. A. (2004)

ELA. The Electronic Journal of Linear Algebra [electronic only]

Positive projections as generators of $J$ -projections of type (B).

Matvejchuk, Marjan Stepanovich, Ionova, Anna Mikhailovna (2007)

Lobachevskii Journal of Mathematics

Properties of an abstract pseudoresolvent and well-posedness of the degenerate Cauchy problem

Irina Melnikova (1996)

Banach Center Publications

The degenerate Cauchy problem in a Banach space is studied on the basis of properties of an abstract analytical function, satisfying the Hilbert identity, and a related pair of operators A, B.

Representational indices of derivations of C-algebras and representations of -algebras on Krein spaces.

Edward Kissin (1993)

Journal für die reine und angewandte Mathematik

Shapes and computer generation of numerical ranges of Krein space operators.

Li, Chi-Kwong, Rodman, Leiba (1998)

ELA. The Electronic Journal of Linear Algebra [electronic only]

The mapping $ν_{x, y}$ in normed linear spaces with applications to inequalities in analysis.

Dragomir, S.S., Koliha, J.J. (1998)

Journal of Inequalities and Applications [electronic only]

Topologías admisibles en espacios con producto interior descomponible.

Robert Fuster Capilla (1985)

Stochastica

In this note we determine the class of indefinite and decomposable inner product spaces in which the natural topology is admissible and we prove the continuity of orthogonal projections in these spaces.

Unbounded representations of a *-algebra on indefinite metric space

Schôichi Ôta (1988)

Annales de l'I.H.P. Physique théorique

What is a disk?

Kari Hag (1999)

Banach Center Publications

This paper should be considered as a companion report to F.W. Gehring’s survey lectures “Characterizations of quasidisks” given at this Summer School [7]. Notation, definitions and background results are given in that paper. In particular, D is a simply connected proper subdomain of $R^{2}$ unless otherwise stated and D* denotes the exterior of D in ${\bar{R}}^{2}$ . Many of the characterizations of quasidisks have been motivated by looking at properties of euclidean disks. It is therefore natural to go back and ask...