| http://www.w3.org/ns/prov#value | - A mapping is said to be demiclosed at if whenever is a sequence in such that and , it follows that .A subset of is said to be a sunny nonexpansive retract of [2] if there exists a sunny nonexpansive retraction of onto and it is called a nonexpansive retract of if there exists a nonexpansive retraction of onto .
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