An extreme point theorem for inverses in a Banach algebra with identity
Published online by Cambridge University Press: 24 October 2008
Extract
A version of Corollary 2 for Hilbert space was orally communicated to the author by C. Pearcy. His proof employed facts about the numerical range, inner products, and orthogonality, and thus made use of structure peculiar to Hilbert space. A Banach algebra with identity is a more comfortable setting for these results, and there it is much clearer just what is important in each proof.
- Type
- Research Article
- Information
- Mathematical Proceedings of the Cambridge Philosophical Society , Volume 63 , Issue 4 , October 1967 , pp. 993 - 994
- Copyright
- Copyright © Cambridge Philosophical Society 1967
References
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