Abstract
This paper presents a brief review, for the most part, of the authors' results concerning systems of differential equations of the form\epsilon \dot{x}^1 = f^i(x^1,\cdots,x^k,y^1,\cdots,y^l) i =1, 2,\cdots,k\dot{y}^i = g^i(x^1,\cdots,x^k,y^1,\cdots,y^l) j =1,2,\cdots,where\epsilonis a small positive parameter. The emphasis is on periodic solutions of such systems which are close to discontinuous solutions. Such periodic solutions are mathematical representations of relaxation oscillations which are encountered in various mechanical, electrical and radio systems.

This publication has 0 references indexed in Scilit: