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Publikováno v:
Mathematica Scandinavica, 2010 Jan 01. 106(2), 283-300.
Externí odkaz:
https://www.jstor.org/stable/24493688
Publikováno v:
MATHEMATICA SCANDINAVICA. 106:283
Given a metric measure space $(X,d,\mu)$, a weight $w$ defined on $(0,\infty)$ and a kernel $k_w(x,y)$ satisfying the standard fractional integral type estimates, we study the boundedness of the operators $K_w f(x)=\int_X k_w(x,y)f(y)\,d\mu(y)$ and $