ANNALS OF FUNCTIONAL ANALYSIS, cilt.11, sa.2, ss.423-438, 2020 (SCI-Expanded)
In this paper we prove a Sobolev-Spanne type M p(center dot),. {x0} (O). Mq(center dot),. {x0} (O)theorem for the potential operators I a, where M p(center dot),. {x0} (O) is local "complementary" generalized Morrey spaces with variable exponent p( x),.(r) is a general function defining the Morrey-type norm and O is an open unbounded subset of Rn. In addition, we prove the boundedness of the commutator of potential operators [b, I a] in these spaces. In all cases the conditions for the boundedness are given in terms of Zygmund-type integral inequalities on.(x, r), which do not assume any assumption on monotonicity of.(x, r) in r.