Indefinite Inner Product Spaces by J Bognar

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Indefinite Inner Product Spaces by J Bognar

By definition, an indefinite inner product space is a real or complex vector space together with a symmetric (in the complex case: hermi- tian) bilinear form prescribed on it so that the corresponding quadratic form assumes both positive and negative values. The most important special case arises when a Hilbert space is considered as an orthogonal direct sum of two subspaces, one equipped with the original inner prod- uct, and the other with -1 times the original inner product. The subject first appeared thirty years ago in a paper of Dirac [1] on quantum field theory (d. also Pauli [lJ). Soon afterwards, Pontrja- gin [1] gave the first mathematical treatment of an indefinite inner prod- uct space. Pontrjagin was unaware of the investigations of Dirac and Pauli; on the other hand, he was inspired by a work of Sobolev [lJ, unpublished up to 1960, concerning a problem of mechanics. The attempts of Dirac and Pauli to apply the concept and elemen- tary properties of indefinite inner product spaces to field theory have been renewed by several authors. At present it is not easy to judge which of their results will contribute to the final form of this part of physics. The following list of references should serve as a guide to the extensive literature: Bleuler [1], Gupta [lJ, Kallen and Pauli [lJ, Heisen- berg [lJ-[4J, Bogoljubov, Medvedev and Polivanov [lJ, K.L.Nagy [lJ-[3], Berezin [lJ, Arons, Han and Sudarshan [1], Lee and Wick [1J.
SKU Unavailable
ISBN 13 9783642655692
ISBN 10 3642655696
Title Indefinite Inner Product Spaces
Author J Bognar
Series Ergebnisse Der Mathematik Und Ihrer Grenzgebiete 2 Folge
Condition Unavailable
Binding Type Paperback
Publisher Springer
Year published 2011-11-11
Number of pages 226
Cover note Book picture is for illustrative purposes only, actual binding, cover or edition may vary.