Displaying similar documents to “Harnack inequality for nonlinear weighted equations.”

Smooth approximation in weighted Sobolev spaces

Tero Kilpeläinen (1997)

Commentationes Mathematicae Universitatis Carolinae

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We give necessary and sufficient conditions for the equality H = W in weighted Sobolev spaces. We also establish a Rellich-Kondrachov compactness theorem as well as a Lusin type approximation by Lipschitz functions in weighted Sobolev spaces.

A two weight weak inequality for potential type operators

Vachtang Michailovič Kokilashvili, Jiří Rákosník (1991)

Commentationes Mathematicae Universitatis Carolinae

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We give conditions on pairs of weights which are necessary and sufficient for the operator T ( f ) = K * f to be a weak type mapping of one weighted Lorentz space in another one. The kernel K is an anisotropic radial decreasing function.