Reproducing subgroups of Sp(2,R). Part II: admissible vectors

Abstract

In part I we introduced the class ${\mathcal{E}}_2$ of Lie subgroups of $Sp(2,\mathbb{R})$ and obtained a classification up to conjugation (Theorem 1.1). Here, we determine for which of these groups the restriction of the metaplectic representation gives rise to a reproducing formula. In all the positive cases we characterize the admissible vectors with a generalized Calderón equation. They include products of 1D-wavelets, directional wavelets, shearlets, and many new examples.

37 pages, 3 figures

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