| Autor: |
Xiangbing Zhou, Wenquan Wu |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Electronic Journal of Differential Equations, Vol 2013, Iss 37,, Pp 1-10 (2013) |
| Druh dokumentu: |
article |
| ISSN: |
1072-6691 |
| Popis: |
In this note, we extend the results by Jia et al [3] to a more general case. By refining the conditions imposed on $f$ and finding more suitable upper and lower solution, we remove some key conditions used in [3], and still establish their results. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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