z-logo
open-access-imgOpen Access
Laguerre operator and its associated weighted Besov and Triebel-Lizorkin spaces
Author(s) -
Xuan Thinh Duong
Publication year - 2016
Publication title -
transactions of the american mathematical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.798
H-Index - 100
eISSN - 1088-6850
pISSN - 0002-9947
DOI - 10.1090/tran/6745
Subject(s) - algorithm , artificial intelligence , computer science
Consider the space X = ( 0 , ∞ ) X=(0,\infty ) equipped with the Euclidean distance and the measure d μ α ( x ) = x α d x d\mu _\alpha (x)=x^{\alpha }dx where α ∈ ( − 1 , ∞ ) \alpha \in (-1,\infty ) is a fixed constant and d x dx is the Lebesgue measure. Consider the Laguerre operator L = − d 2 d x 2 − α x d d x + x 2 \displaystyle L=-\frac {d^2}{dx^2} -\frac {\alpha }{x}\frac {d}{dx}+x^2 on X X . The aim of this article is threefold. Firstly, we establish a Calderón reproducing formula using a suitable distribution of the Laguerre operator. Secondly, we study certain properties of the Laguerre operator such as a Harnack type inequality on the solutions and subsolutions of Laplace equations associated to Laguerre operators. Thirdly, we establish the theory of the weighted homogeneous Besov and Triebel-Lizorkin spaces associated to the Laguerre operator. We define the weighted homogeneous Besov and Triebel-Lizorkin spaces by the square functions of the Laguerre operator, then show that these spaces have an atomic decomposition. We then study the fractional powers L − γ , γ > 0 L^{-\gamma }, \gamma >0 , and show that these operators map boundedly from one weighted Besov space (or one weighted Triebel-Lizorkin space) to another suitable weighted Besov space (or weighted Triebel-Lizorkin space). We also show that in particular cases of the indices, our new weighted Besov and Triebel-Lizorkin spaces coincide with the (expected) weighted Hardy spaces, the weighted L p L^p spaces or the weighted Sobolev spaces in Laguerre settings.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here