Composition of fractional Orlicz maximal operators and A 1-weights on spaces of homogeneous type

被引:11
作者
Bernardis, Ana L. [1 ]
Pradolini, Gladis [1 ]
Lorente, Maria [2 ]
Silvina Riveros, Maria [3 ]
机构
[1] IMAL CONICET FIQ UNL, RA-3000 Santa Fe, Argentina
[2] Univ Malaga, Fac Ciencias, Dept Anal Matemat, E-29071 Malaga, Spain
[3] FaMAF Univ Nacl Cordoba CIEM, CONICET, RA-5000 Cordoba, Argentina
关键词
Orlicz maximal function; spaces of homogeneous type; weights; WEIGHTED NORM INEQUALITIES; SINGULAR-INTEGRALS; COMMUTATORS;
D O I
10.1007/s10114-010-8445-4
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
For a Young function I similar to with 0 a parts per thousand currency sign alpha < 1, let M (alpha,I similar to) be the fractional Orlicz maximal operator defined in the context of the spaces of homogeneous type (X, d, A mu) by M (alpha,I similar to) f(x) = sup (xaB) A mu(B) (alpha) aEuro-faEuro-(I similar to,B) , where aEuro-faEuro-(I similar to,B) is the mean Luxemburg norm of f on a ball B. When alpha = 0 we simply denote it by M (I similar to). In this paper we prove that if I broken vertical bar and I are two Young functions, there exists a third Young function I similar to such that the composition M (alpha,I) a similar to M (I broken vertical bar) is pointwise equivalent to M (alpha,I similar to). As a consequence we prove that for some Young functions I similar to, if M (alpha,I similar to) f < a a.e. and delta a (0, 1) then (M (alpha,I similar to) f) (delta) is an A (1)-weight.
引用
收藏
页码:1509 / 1518
页数:10
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