On norms in indefinite product spaces

Langer, M. and Luger, A.; Behrndt, Jussi and Förster, Karl-Heinz and Trunk, Carsten, eds. (2010) On norms in indefinite product spaces. In: Recent Advances in Operator Theory in Hilbert and Krein Spaces. Operator Theory: Advances and Applications, 198 . Birkhäuser, pp. 259-264. ISBN 978-3-0346-0179-5

Full text not available in this repository.Request a copy from the Strathclyde author


In a Krein space various norms can be defined by choosing different underlying fundamental decompositions. In this note we consider this dependence explicitly and draw the conclusion that - even in a Pontryagin space - there does not exist a natural choice motivated by minimizing properties.