Functional expansion - compression fixed point theorem of Leggett-Williams type

Electronic Journal of Differential Equations

关键词: Fixed-point theorems;    Leggett-Williams;    expansion;    compression;    positive solutions;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper presents a fixed point theorem of compressionand expansion of functional type in the spirit of the originalfixed point work of Leggett-Williams. Neither the entirelower nor the entire upper boundary is required to be mappedinward or outward.

【 授权许可】

Unknown