This paper establishes a Horn-type fixed point theorem in Fréchet spaces which is ananswer to Burton’s problem in these spaces.As an application of the result,the authorsobtain an existence theorem of periodic s...This paper establishes a Horn-type fixed point theorem in Fréchet spaces which is ananswer to Burton’s problem in these spaces.As an application of the result,the authorsobtain an existence theorem of periodic solutions for functional differential equations withinfinite delay.展开更多
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文摘This paper establishes a Horn-type fixed point theorem in Fréchet spaces which is ananswer to Burton’s problem in these spaces.As an application of the result,the authorsobtain an existence theorem of periodic solutions for functional differential equations withinfinite delay.