Invariant sets and the hokohara-kneser property for systems of parabolic partial differential equations
Invariant sets and the hokohara-kneser property for systems of parabolic partial differential equations
1. Introduction. During the past few years much work has been devoted to the problem of characterizin g sets which are invariant with respect to a given ordinary differential equation. More recently the papers [ 2], [ 15] have addressed themselves to the same question for nonlinear parabolic differential equations. …