Special Session 10: Recent Developments in Regularity Theory for PDEs

On the Aleksandrov-Bakelman-Pucci estimate for 1-Laplace-type equations
Shuhei Kitano
Waseda University
Japan
Co-Author(s):    
Abstract:
In this talk, I will present a new $L^\infty$ bound for solutions to the Poisson problem associated with the weighted $1$-Laplacian. This estimate is analogous to the classical result for uniformly elliptic equations established independently by Aleksandrov, Bakelman, and Pucci in the 1960s, and it is based on an analysis of the contact set of the solutions and their quasiconcave envelopes.