By C. Cabrelli and others

Given discrete groups \(\Gamma \subset \Delta\) we characterize \((\Gamma,\sigma)\)-invariant spaces that are also invariant under \(\Delta\). This will be done in terms of subspaces that we define using an appropriate Zak transform and a particular partition of the underlying group. On the way, we obtain a new characterization of principal... Show more

December 28, 2019

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Extra-invariance of group actions

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