# Endpoint estimates for commutators of singular integrals related to Schr\"odinger operators

Abstract : Let $L= -\Delta+ V$ be a Schr\"odinger operator on $\mathbb R^d$, $d\geq 3$, where $V$ is a nonnegative potential, $V\ne 0$, and belongs to the reverse H\"older class $RH_{d/2}$. In this paper, we study the commutators $[b,T]$ for $T$ in a class $\mathcal K_L$ of sublinear operators containing the fundamental operators in harmonic analysis related to $L$. More precisely, when $T\in \mathcal K_L$, we prove that there exists a bounded subbilinear operator $\mathfrak R= \mathfrak R_T: H^1_L(\mathbb R^d)\times BMO(\mathbb R^d)\to L^1(\mathbb R^d)$ such that $$\label{abstract 1} |T(\mathfrak S(f,b))|- \mathfrak R(f,b)\leq |[b,T](f)|\leq \mathfrak R(f,b) + |T(\mathfrak S(f,b))|,$$ where $\mathfrak S$ is a bounded bilinear operator from $H^1_L(\mathbb R^d)\times BMO(\mathbb R^d)$ into $L^1(\mathbb R^d)$ which does not depend on $T$. The subbilinear decomposition (\ref{abstract 1}) allows us to explain why commutators with the fundamental operators are of weak type $(H^1_L,L^1)$, and when a commutator $[b,T]$ is of strong type $(H^1_L,L^1)$. Also, we discuss the $H^1_L$-estimates for commutators of the Riesz transforms associated with the Schr\"odinger operator $L$.
Type de document :
Article dans une revue
Revista Matemática Iberoamericana, European Mathematical Society, 2015, 43 p
Domaine :

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https://hal.archives-ouvertes.fr/hal-01143641
Contributeur : Luong Dang Ky <>
Soumis le : dimanche 19 avril 2015 - 07:36:04
Dernière modification le : jeudi 3 mai 2018 - 15:32:07
Document(s) archivé(s) le : lundi 14 septembre 2015 - 10:35:48

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Commutators_Schrodinger.pdf
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• HAL Id : hal-01143641, version 1

### Citation

Luong Dang Ky. Endpoint estimates for commutators of singular integrals related to Schr\"odinger operators. Revista Matemática Iberoamericana, European Mathematical Society, 2015, 43 p. 〈hal-01143641〉

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