TY  - MGZN
AU  - Ros, X.
AU  - Serra, J.
T2  - Journal of differential equations
Y1  - 2016
VL  - 260
IS  - 12
SP  - 8675
EP  - 8715
DO  - 10.1016/j.jde.2016.02.033
UR  - http://www.sciencedirect.com/science/article/pii/S0022039616000991
AB  - We establish sharp regularity estimates for solutions to Lu = f in Omega subset of R-n being the generator of any stable and symmetric Levy process. Such nonlocal operators L depend on a finite measure on Sn-1, called the spectral measure.; First, we study the interior regularity of solutions to Lu = f in B-1. We prove that if f is C-alpha then u belong to C alpha+2s whenever alpha + 2s is not an integer. In case f is an element of L-infinity we show that the solution u is C-2s when s not equal 1/2, and C2s - is an element of for all epsilon > 0 when s =1/2.; Then, we study the boundary regularity of solutions to Lu = f in Omega, u = 0 in R-n \ Omega, in C-1,C-1 domains Omega We show that solutions u satisfy u/d(s) is an element of Cs-is an element of (Omega) for all epsilon > 0, where d is the distance to partial derivative Omega. Finally, we show that our results are sharp by constructing two counterexamples.
TI  - Regularity theory for general stable operators
ER  -