New Proof of Naimark's Theorem on the Existence of Nonpositive Invariant Subspaces for Commuting Families of Unitary Operators in Pontryagin Spaces.
Monatshefte für Mathematik (1990)
- Volume: 109, Issue: 2, page 153-156
- ISSN: 0026-9255; 1436-5081/e
Monatshefte für Mathematik (1990)