Guliyev V. S., Nazirova Sh. A.
A rearrangement estimate for the generalized multilinear fractional
integrals
We study the Lp1× Lp2×…×
Lpk boundedness of generalized multilinear
fractional integrals. An O’Neil type inequality for a k-linear
integral operator is proved. Using an O’Neil type inequality for a k-linear
integral operator, we obtain a pointwise rearrangement estimate of generalized
multilinear fractional integrals. By way of application we prove a Sobolev
type theorem for these integrals.