International Journal of Mathematics and Mathematical Sciences

Volume 13 (1990), Issue 2, Pages 253-270

doi:10.1155/S0161171290000382

## A necessary and sufficient condition for uniqueness of solutions of singular differential inequalities

# Alan V. Lair

Department of Mathematics and Computer Science, Air Force Institute of Technology, Wright-Patterson AFB 45433, OH, USA

Received 12 December 1988; Revised 20 July 1989

Copyright © 1990 Alan V. Lair. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

#### Abstract

The author proves that the abstract differential inequality