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math.CA2007
Function spaces of variable smoothness and integrability
Lars Diening, Peter Hästö, Svetlana Roudenko
In this article we introduce Triebel--Lizorkin spaces with variable smoothness and integrability. Our new scale covers spaces with variable exponent as well as spaces of variable s…
math.CA2007
A universal Stein-Tomas restriction estimate for measures in three dimensions
Alex Iosevich, Svetlana Roudenko
We study restriction estimates in R^3 for surfaces given as graphs of W^1_1(R^2) (integrable gradient) functions. We obtain a "universal" L^2(mu) -> L^4(R^3, L^2(SO(3))) estimate f…