Generalized lower and upper functions for the φ-Laplacian
A. Ya. Lepin, L. A. Lepin · Differential Equations · 2014
We give definitions of generalized lower and upper functions and generalized solution, which differs from a solution in the conventional sense in that the derivative of a generalized solution can be equal to +∞ and −∞. We show how to use generalized solutions for obtaining classical results.