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Approximation by group invariant subspaces
Davide Barbieri, Carlos Cabrelli, Eugenio Hernández +1
In this article we study the structure of -invariant spaces of . Here is a second countable LCA group. The invariance is with respect to the action of , a…
Spaces invariant under unitary representations of discrete groups
Davide Barbieri, Eugenio Hernández, Victoria Paternostro
We investigate the structure of subspaces of a Hilbert space that are invariant under unitary representations of a discrete group. We work with square integrable representations, a…
Noncommutative Shift-Invariant Spaces
Davide Barbieri, Eugenio Hernández, Victoria Paternostro
The structure of subspaces of a Hilbert space that are invariant under unitary representations of a discrete group is related to a notion of Hilbert modules endowed with inner prod…