Viscosity solutions of fully nonlinear second-order elliptic partial differential equations H. Ishii* and P. L. Lions†
Department of Mathematics, Chuo University, Bunkyo-ku, Tokyo 112, Japan
Ceremade, Université Paris-Dauphine, Place de Lattre de Tassigny, 75775, Paris Cedex 16, France
Received 6 June 1988.
Available online 30 June 2004.