Abstract
In this paper, we introduce the concept of an asymptotically \({\Phi}\)-nonexpansive operator. In addition, we establish some Krasnoselskiitype fixed point theorems for the sum of two operators A and B, where the operator A is assumed to be (ws)-compact, and B is a (ws)-compact and asymptotically \({\Phi}\)-nonexpansive operator on an unbounded closed convex subset of a Banach space. Also we present Leray–Schauder alternatives and Furi–Pera-type fixed point theorems for the sum of two (ws)-compact map**s.
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Ben Amar, A., O’Regan, D. & Touati, A. Fixed point theorems for the sum of (ws)-compact and asymptotically \({\Phi}\)-nonexpansive map**s. J. Fixed Point Theory Appl. 18, 771–784 (2016). https://doi.org/10.1007/s11784-016-0326-8
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DOI: https://doi.org/10.1007/s11784-016-0326-8