Zak Transform for Semidirect Product of Locally Compact Groups

Details Zak Transform for Semidirect Product of Locally Compact Groups Zak Transform for Semidirect Product of Locally Compact Groups

2012-03-07

arxiv.org/abs/1203.1509v1

Mathematics

Functional Analysis

Scientific paper

Let $H$ be a locally compact group and $K$ be an LCA group also let $\tau:H\to Aut(K)$ be a continuous homomorphism and $G_\tau=H\ltimes_\tau K$ be the semidirect product of $H$ and $K$ with respect to $\tau$. In this article we define the Zak transform $\mathcal{Z}_L$ on $L^2(G_\tau)$ with respect to a $\tau$-invariant uniform lattice $L$ of $K$ and we also show that the Zak transform satisfies the Plancherel formula. As an application we show that how these techniques apply for the semidirect product group $\mathrm{SL}(2,\mathbb{Z})\ltimes_\tau\mathbb{R}^2$ and also the Weyl-Heisenberg groups.

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