Bibliography

1

M. G. Crandall, H. Ishii and P. L. Lions, User's guide to viscosity solutions of second order partial differential equations, Bull. Amer. Math. Soc., 27 (1992), 1-67.

2

P. L. Lions, Optimal control of diffusion processes and Hamilton- Jacobi-Bellman equations, Comm. in PDEs, 8 (1983), 1229-1276.

3

K. Maruo and Y. Tomita, Radial viscosity solutions of the Dirichlet problem for semilinear degenerate elliptic equations, O.J.M., 38 (2001), 1-21

Nuna adreso:

Kenji MARUO and Yoshihito TOMITA

Department of Mathematics

Kobe University of Merchantile Marine

Fukae, Kobe 657-0022

Japan

E-mail: maruo@cc.kshosen.ac.jp