Results 31 to 33 of about 467 (33)

A remark on the Schrödinger operator on Wiener amalgam spaces [PDF]

arXiv, 2017
In this paper, we study the boundedness of the Schr\"odinger operator $e^{i \Delta}$ on Wiener amalgam spaces and determine its optimal condition.
arxiv  

On Positivity Preserving, Translation Invariant, Operators in $L^p(\mathbb{R}^n)^m$ [PDF]

arXiv, 2017
We characterize positivity preserving, translation invariant, linear operators in $L^p(\mathbb{R}^n)^m$, $p \in [1,\infty)$, $m,n \in \mathbb{N}$.
arxiv  

A counterexample to weighted estimates for multilinear Fourier multipliers with Sobolev regularity [PDF]

arXiv, 2013
The problem whether weighted estimates for multilinear Fourier multipliers with Sobolev regularity hold under weak condition on weights is considered.
arxiv