Commutators on Weighted Morrey Spaces on Spaces of Homogeneous Type

Abstract

In this paper, we study the boundedness and compactness of the commutator of Calderón– Zygmund operators T on spaces of homogeneous type (X, d, µ) in the sense of Coifman and Weiss. More precisely, we show that the commutator [b, T] is bounded on the weighted Morrey space Lωp,k(X)L_\omega ^{p,k}\left( X \right) with κ ∈ (0, 1) and ω ∈ Ap(X), 1 < p < ∞, if and only if b is in the BMO space. We also prove that the commutator [b, T] is compact on the same weighted Morrey space if and only if b belongs to the VMO space. We note that there is no extra assumptions on the quasimetric d and the doubling measure µ.

Keywords

• commutator
• compact operator
• bmo space
• vmo space
• weighted morrey space
• space of homogeneous type
• 42b20
• 43a80