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- W4311681597 abstract "Abstract The goal of this paper is to develop some fundamental and important nonlinear analysis for single-valued mappings under the framework of p -vector spaces, in particular, for locally p -convex spaces for $0 < p leq 1$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mn>0</mml:mn><mml:mo><</mml:mo><mml:mi>p</mml:mi><mml:mo>≤</mml:mo><mml:mn>1</mml:mn></mml:math> . More precisely, based on the fixed point theorem of single-valued continuous condensing mappings in locally p -convex spaces as the starting point, we first establish best approximation results for (single-valued) continuous condensing mappings, which are then used to develop new results for three classes of nonlinear mappings consisting of 1) condensing; 2) 1-set contractive; and 3) semiclosed 1-set contractive mappings in locally p -convex spaces. Next they are used to establish the general principle for nonlinear alternative, Leray–Schauder alternative, fixed points for nonself mappings with different boundary conditions for nonlinear mappings from locally p -convex spaces, to nonexpansive mappings in uniformly convex Banach spaces, or locally convex spaces with the Opial condition. The results given by this paper not only include the corresponding ones in the existing literature as special cases, but are also expected to be useful tools for the development of new theory in nonlinear functional analysis and applications to the study of related nonlinear problems arising from practice under the general framework of p -vector spaces for $0< p leq 1$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mn>0</mml:mn><mml:mo><</mml:mo><mml:mi>p</mml:mi><mml:mo>≤</mml:mo><mml:mn>1</mml:mn></mml:math> . Finally, the work presented by this paper focuses on the development of nonlinear analysis for single-valued (instead of set-valued) mappings for locally p -convex spaces. Essentially, it is indeed the continuation of the associated work given recently by Yuan (Fixed Point Theory Algorithms Sci. Eng. 2022:20, 2022); therein, the attention is given to the study of nonlinear analysis for set-valued mappings in locally p -convex spaces for $0 < p leq 1$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mn>0</mml:mn><mml:mo><</mml:mo><mml:mi>p</mml:mi><mml:mo>≤</mml:mo><mml:mn>1</mml:mn></mml:math> ." @default.
- W4311681597 created "2022-12-28" @default.
- W4311681597 creator A5029556362 @default.
- W4311681597 date "2022-12-07" @default.
- W4311681597 modified "2023-09-30" @default.
- W4311681597 title "Nonlinear analysis in p-vector spaces for single-valued 1-set contractive mappings" @default.
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