51 research outputs found
Weighted inequalities and pointwise estimates for the multilinear fractional integral and maximal operators
In this article we prove weighted norm inequalities and pointwise estimates
between the multilinear fractional integral operator and the multilinear
fractional maximal. As a consequence of these estimations we obtain weighted
weak and strong inequalities for the multilinear fractional integral operator.
In particular, we extend some results given in \cite{CPSS} to the multilinear
context. On the other hand we prove weighted pointwise estimates between the
multilinear fractional maximal operator associated to a
Young function and the multilinear maximal operators , . As an
application of these estimate we obtain a direct proof of the
boundedness results of for the case and
when . We also give sufficient
conditions on the weights involved in the boundedness results of that generalizes those given in \cite{M} for . Finally,
we prove some boundedness results in Banach function spaces for a generalized
version of the multilinear fractional maximal operator
Boundedness of fractional operators in weighted variable exponent spaces with non doubling measures
In the context of variable exponent Lebesgue spaces equipped with a lower
Ahlfors measure we obtain weighted norm inequalities over bounded domains for
the centered fractional maximal function and the fractional integral operator
Two-weighted estimates for generalized fractional maximal operators on non-homogeneous spaces
summary:Let be a nonnegative Borel measure on satisfying that for every cube , where is the side length of the cube and . \endgraf We study the class of pairs of weights related to the boundedness of radial maximal operators of fractional type associated to a Young function in the context of non-homogeneous spaces related to the measure . Our results include two-weighted norm and weak type inequalities and pointwise estimates. Particularly, we give an improvement of a two-weighted result for certain fractional maximal operator proved in W. Wang, C. Tan, Z. Lou (2012)
End-point estimates for iterated commutators of multilinear singular integrals
Iterated commutators of multilinear Calderon-Zygmund operators and pointwise
multiplication with functions in are studied in products of Lebesgue
spaces. Both strong type and weak end-point estimates are obtained, including
weighted results involving the vectors weights of the multilinear
Calderon-Zygmund theory recently introduced in the literature. Some better than
expected estimates for certain multilinear operators are presented too.Comment: A typo in the original manuscript lead to overlook a gap in one of
our arguments which has been fixed. The new arguments are provided in the
proof of Theorem 3.1 in Section 3. With the exception of some new notation
introduced and some minor changes in wording in a few places, those new
details are the only modifications to the original manuscrip
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