Bsplines on the Heisenberg group
Abstract
In this paper, we introduce a class of $B$splines on the Heisenberg group $\mathbb{H}$ and study their fundamental properties. Unlike the classical case, we prove that there does not exist any sequence $\{\alpha_n\}_{n\in\mathbb{N}}$ such that $L_{(n.\frac{n}{2},\alpha_n)}\phi_n(x,y,t)=L_{(n.\frac{n}{2},\alpha_n)}\phi_n(x,y,t)$, for $n\geq 2$, where $L_{(x,y,t)}$ denotes the left translation on $\mathbb{H}$. We further investigate the problem of finding an equivalent condition for the system of left translates to form a frame sequence or a Riesz sequence in terms of twisted translates. We also find a sufficient condition for obtaining an oblique dual of the system $\{L_{(2k,l,m)}g:k,l,m\in\mathbb{Z}\}$ for a certain class of functions $g\in L^2(\mathbb{H})$. These concepts are illustrated by some examples. Finally, we make some remarks about $B$splines regarding these results.
 Publication:

arXiv eprints
 Pub Date:
 May 2021
 arXiv:
 arXiv:2105.07707
 Bibcode:
 2021arXiv210507707D
 Keywords:

 Mathematics  Functional Analysis;
 42C15;
 41A15;
 43A30