Sixth Mississippi State Conference on Differential Equations and
Computational Simulations.
Electronic Journal of Differential Equations,
Conference 15 (2007), pp. 377-385. 

Title: Revisiting the method of sub- and supersolutions  for
       nonlinear elliptic problems

Author: Klaus Schmitt (Univ. of Utah, Salt Lake City, UT, USA)
 
Abstract: 
 We discuss some of the historical highlights of the theory
 of sub- supersolutions for boundary value problems
 for nonlinear elliptic equations and variational inequalities.

Published February 28, 2007.
Math Subject Classifications: 35B45, 35J65, 35J60.
Key Words: Sub- and supersolutions; general boundary conditions;
           variational inequalities