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math.FA2016
Group Riesz and Frame Sequences: The Bracket and the Gramian
Davide Barbieri, Eugenio Hernandez, Victoria Paternostro
Given a discrete group and a unitary representation on a Hilbert space , we prove that the notions of operator Bracket map and Gramian coincide on a dense set of $\mat…
math.CA2016
An Approximation Problem in Multiplicatively Invariant Spaces
Carlos Cabrelli, Carolina A. Mosquera, Victoria Paternostro
Let be Hilbert space and a -finite measure space. Multiplicatively invariant (MI) spaces are closed subspaces of that are invariant…