Sharp Adams and Moser-Trudinger inequalities on R^n and other spaces of infinite measure
arXiv:1504.04678
Abstract
We derive sharp Adams inequalities for the Riesz and other potentials of functions with arbitrary compact support in R^n. Up to now such results were only known for a class of functions whose supports have uniformly bounded measure. We obtain several sharp Moser-Trudinger inequalities for the critical Sobolev space W^{d,n/d} on R^n and on the hyperbolic space H^n The only known results so far are for d= 1, both on R^n and H^n, and for d = 2 on R^n. Other sharp inequalities are obtained for general elliptic operators with constant coefficients and for trace type Borel measures. We introduce critical potential spaces on which our results can be extended to noninteger values of d.
55 Pages. Changes in v2 include: additional references, minor stylistic changes, slight changes in the statement of Theorem 3 and Corollary 4, part of the proof of Theorem 3 moved to the appendix. Changes in v3 include typo corrections and Proposition 20