Title of article
A class of functions whose sublevel sets are absolute retracts
Author/Authors
Ricceri، نويسنده , , Biagio، نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 2008
Pages
3
From page
871
To page
873
Abstract
In this paper, we prove a result of which the following is a corollary: If X is a Banach space and J : X → R is a contraction, then the nonempty sublevel sets of the function x → ‖ x ‖ + J ( x ) are absolute retracts.
Keywords
Sublevel set , Absolute retract , Set-valued contraction , Fixed point
Journal title
Topology and its Applications
Serial Year
2008
Journal title
Topology and its Applications
Record number
1581632
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