Journal of Applied Mathematics and Stochastic Analysis
Volume 4 (1991), Issue 2, Pages 129-136
doi:10.1155/S1048953391000096
    
    
    Unique solution to periodic boundary value problems
    
    Department of Applied Mathematics, Florida Institute of Technology, Melbourne 32901, FL, USA
    
    
    
    Received 1 December 1990; Revised 1 April 1991
    	
    
       
    Copyright © 1991 Yong  Sun. 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
Existence of unique solution to periodic boundary value problems of differential equations with continuous or discontinuous right-hand side is considered by utilizing the method of lower and upper solutions and the monotone properties of the operator. This is subject to discussion in the present paper.