Special Session 95: Nonlinear analysis and elliptic boundary value problems

Multiple critical point results to Sturm-Liouville-type differential problems with highly discontinuous reaction term

Bruno Vassallo
University of Palermo
Italy
Co-Author(s):    Roberto Livrea
Abstract:
We consider Sturm-Liouville-type differential problems dependent on a parameter with various boundary conditions. The reaction term $f$ belongs to a class of almost everywhere continuous functions and the set of the points of discontinuity of $f$ may also be uncountable. Combining variational methods with critical point theorems for non-differentiable functions, weak solutions to the problems are established provided the parameter belongs to an explicit interval.