Causal difference equations with upper and lower solutions in the reverse order
Abstract This paper is devoted to studying the existence conditions for difference equations involving causal operators in the presence of upper and lower solutions in the reverse order. To this end, we prove some new comparison theorems and develop the upper and lower solutions method. Our results...
Main Authors: | , |
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Format: | Article |
Language: | English |
Published: |
SpringerOpen
2019-04-01
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Series: | Advances in Difference Equations |
Subjects: | |
Online Access: | http://link.springer.com/article/10.1186/s13662-019-2078-4 |