Archive for Rational Mechanics and Analysis

, Volume 206, Issue 1, pp 111–157

Aleksandrov–Bakelman–Pucci Type Estimates for Integro-Differential Equations

Authors

  • Nestor Guillen
    • Department of MathematicsUniversity of Texas
    • Department of Mathematical SciencesCarnegie Mellon University
Article

DOI: 10.1007/s00205-012-0529-0

Cite this article as:
Guillen, N. & Schwab, R.W. Arch Rational Mech Anal (2012) 206: 111. doi:10.1007/s00205-012-0529-0

Abstract

In this work we provide an Aleksandrov–Bakelman–Pucci type estimate for a certain class of fully nonlinear elliptic integro-differential equations, the proof of which relies on an appropriate generalization of the convex envelope to a nonlocal, fractional-order setting and on the use of Riesz potentials to interpret second derivatives as fractional order operators. This result applies to a family of equations involving some nondegenerate kernels and, as a consequence, provides some new regularity results for previously untreated equations. Furthermore, this result also gives a new comparison theorem for viscosity solutions of such equations which depends only on the L and Ln norms of the right-hand side, in contrast to previous comparison results which utilize the continuity of the right-hand side for their conclusions. These results appear to be new, even for the linear case of the relevant equations.

Copyright information

© Springer-Verlag 2012