Oscillation Criteria for Semilinear Equations in General Domains
Oscillation Criteria for Semilinear Equations in General Domains
Oscillation theory for nonlinear ordinary differential equations has been extensively developed in recent years by several authors. We refer the reader to the recent paper by Noussair and Swanson, [2], where an extensive bibliography may be found. The situation is somewhat different for the case of second order partial differential …