Results 61 to 70 of about 1,609 (94)

A Formula and Sharp Estimates for the Dunkl Kernel for the Root System A2

open access: yesJournal of Lie Theory
In this paper, we transform a formula for the $A_2$ Dunkl kernel by Béchir Amri. The resulting formula expresses the $A_2$ Dunkl kernel in terms of the $A_1$ Dunkl kernel involving only positive terms. This result allows us to derive sharp estimates for the $A_2$ Dunkl kernel.
Graczyk, Piotr, Sawyer, Patrice
openaire   +3 more sources

Oppenheim's Problem and Some Inequalities Involving Bessel Functions and Dunkl Kernels [PDF]

open access: yesTurkish Journal of Analysis and Number Theory, 2018
In this paper, we establish some inequalities related to Oppenheim's problem for the real and imaginary parts of Dunkl kernels In order to prove our main results, we present some new inequalities involving Bessel functions of the first kind. Refinements of inequalities for Bessel functions are also given.
openaire   +1 more source

Optimal bounds for the Dunkl kernel in the dihedral case

open access: yesJournal of Functional Analysis
We establish sharp upper and lower estimates of the Dunkl kernel in the case of dihedral groups.
Anker, Jean-Philippe, Trojan, Bartosz
openaire   +2 more sources

Pitt's inequalities and uncertainty principle for generalized Fourier transform

open access: yes, 2015
We study the two-parameter family of unitary operators \[ \mathcal{F}_{k,a}=\exp\Bigl(\frac{i\pi}{2a}\,(2\langle k\rangle+{d}+a-2 )\Bigr) \exp\Bigl(\frac{i\pi}{2a}\,\Delta_{k,a}\Bigr), \] which are called $(k,a)$-generalized Fourier transforms and ...
Gorbachev, Dmitry   +2 more
core  

Paley-Wiener theorems for the Dunkl transform

open access: yes, 2005
We conjecture a geometrical form of the Paley-Wiener theorem for the Dunkl transform and prove three instances thereof, one of which involves a limit transition from Opdam's results for the graded Hecke algebra.
de Jeu, Marcel
core  

Locally learning biomedical data using diffusion frames. [PDF]

open access: yesJ Comput Biol, 2012
Ehler M, Filbir F, Mhaskar HN.
europepmc   +1 more source

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