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$N_{φ}$ -type quotient modules on the torus.

Izuchi, Keiji, Yang, Rongwei (2008)

The New York Journal of Mathematics [electronic only]

New Proof of Naimark's Theorem on the Existence of Nonpositive Invariant Subspaces for Commuting Families of Unitary Operators in Pontryagin Spaces.

Zoltán Sasvári (1990)

Monatshefte für Mathematik

Non-hyperreflexive reflexive spaces of operators

Roman V. Bessonov, Janko Bračič, Michal Zajac (2011)

Studia Mathematica

We study operators whose commutant is reflexive but not hyperreflexive. We construct a C₀ contraction and a Jordan block operator $S_{B}$ associated with a Blaschke product B which have the above mentioned property. A sufficient condition for hyperreflexivity of $S_{B}$ is given. Some other results related to hyperreflexivity of spaces of operators that could be interesting in themselves are proved.

Non-reflexive pentagon subspace lattices

M. Lambrou, W. Longstaff (1997)