Abstract
We study the boundedness of integral operators of convolution type in the Lebesgue spaces with weights. As a byproduct, we give a simple proof of the fact that the standard Sobolev space $H^s(\mathbb{R}^n)$ forms an algebra for $s$ > $n/2$. Moreover, an optimality criterion is presented in the framework of weighted $L^p$-boundedness.
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