Time frequency analysis and multipliers of the spaces $M(p,q) (R^d)$ and $S(p,q) (R^d)$
Gürkanli, A. Turan
J. Math. Kyoto Univ., Tome 46 (2006) no. 4, p. 595-616 / Harvested from Project Euclid
In the second section of this paper, in analogy to modulation spaces, we define the space $M(p, q)(R^{d})$ to be the subspace of tempered distributions $f \in S'(R^{d})$ such that the Gabor transform $V_{g}(f)$ of $f$ is in the Lorentz space $L(p, q)(R^{2d})$, where the window function $g$ is a rapidly decreasing function. We endow this space with a suitable norm and show that the $M(p, q)(R^{d})$ becomes a Banach space and is invariant under time-frequency shifts for $1 \leq p,q \leq \infty$. We also discuss the dual space of $M(p, q)(R^{d})$ and the multipliers from $L^{1}(R^{d})$ into $M(p, q)(R^{d})$. In the third section we intend to study the intersection space $S (p, q)(R^{d}) = L^{1}(R^{d})\cap M (p, q)(R^{d})$ for $1 < p < \infty$, $1 \leq q \leq \infty$. We endow it with the sum norm and show that $S (p, q)(R^{d})$ becomes a Banach convolution algebra. Further we prove that it is also a Segal algebra. In the last section we discuss the multipliers of $S (p, q)(R^{d})$ and $M (p, q)(R^{d})$.
Publié le : 2006-05-15
Classification:  42B15,  46E30
@article{1250281751,
     author = {G\"urkanli, A. Turan},
     title = {Time frequency analysis and multipliers of the spaces $M(p,q) (R^d)$ and $S(p,q) (R^d)$},
     journal = {J. Math. Kyoto Univ.},
     volume = {46},
     number = {4},
     year = {2006},
     pages = { 595-616},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1250281751}
}
Gürkanli, A. Turan. Time frequency analysis and multipliers of the spaces $M(p,q) (R^d)$ and $S(p,q) (R^d)$. J. Math. Kyoto Univ., Tome 46 (2006) no. 4, pp.  595-616. http://gdmltest.u-ga.fr/item/1250281751/