This paper is devoted to multiplicative inequalities in some generalized Sobolev spaces associated with Lie algebras. These Lie algebras are generated by the differential operator of variable coefficients or by pseudo-differential operators having non-regular symbols. Under geometrical assumptions we show that the norms of two suitable classes of generalized Sobolev spaces are equivalent. This leads to the proof that the composition operator u → | u |p acts on such spaces.
|Number of pages||36|
|Journal||Nonlinear Analysis, Theory, Methods and Applications|
|Publication status||Published - 2009 Feb 15|
- Generalized Sobolev norms
- Nonlinear inequalities
ASJC Scopus subject areas
- Applied Mathematics