International Journal of Mathematics and Mathematical Sciences 
Volume 20 (1997), Issue 4, Pages 699-706
doi:10.1155/S0161171297000951

Regular and singular perturbations of upper semicontinuous differential inclusion

Tzanko Donchev and Vasil Angelov

Department of Mathematics, University of Mining and Geology, SOFIA 1100, Bulgaria

Received 13 November 1995; Revised 11 April 1996

Abstract

In the paper we study the continuity properties of the solution set of upper semicontinuous differential inclusions in both regularly and singularly perturbed case. Using a kind of dissipative type of conditions introduced in [1] we obtain lower semicontinuous dependence of the solution sets. Moreover new existence result for lower semicontinuous differential inclusions is proved.