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Acta Mathematica Vietnamica

SOME FRIEDRICHS TYPE INEQUALITIES IN THE FULL EUCLIDEAN SPACE

icon-email JU. A. DUBINSKII

Abstract

In this paper we prove the inequality RnμR(|x|)|u(x)|pdxM[Rn|u(x)|pω(|x|)dx+||x|=Ru(x)ds|p], where ω(|x|)>0 and μR(|x|)>0 are the weight functions, R>0 is an arbitrary number. In doing so, we first show some ”two-sides” Hardy type inequalities.