In various applications, we can meet boundary value problems for elliptic equations whose ellipticity is disturbed in the sense that some degeneration or singul

Various weighted inequalities and weighted function spaces relevant to degenerate partial differential equations are studied. The results are applied to degener

The book systematically develops the nonlinear potential theory connected with the weighted Sobolev spaces, where the weight usually belongs to Muckenhoupt's cl

A self-contained treatment appropriate for advanced undergraduates and graduate students, this text offers a detailed development of the necessary background fo