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Article
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Transactions of the American Mathematical Society
Article . 1972 . Peer-reviewed
Data sources: Crossref
Transactions of the American Mathematical Society
Article . 1972 . Peer-reviewed
Data sources: Crossref
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Spaces of Set-Valued Functions

Spaces of set-valued functions
Authors: O'Steen, David N.;

Spaces of Set-Valued Functions

Abstract

If X X and Y Y are topological spaces, the set of all continuous functions from X X into C Y CY , the space of nonempty, compact subsets of Y Y with the finite topology, contains a copy (with singleton sets substituted for points) of Y X {Y^X} , the continuous point-valued functions from X X into Y Y . It is shown that Y X {Y^X} is homeomorphic to this copy contained in ( C Y ) X {(CY)^X} (where all function spaces are assumed to have the compact-open topology) and that, if X X or Y Y is T 2 , ( C Y ) X {T_2},{(CY)^X} is homoemorphic to a subspace of ( C Y ) C X {(CY)^{CX}} . Further, if Y Y is T 2 {T_2} , then these images of Y X {Y^X} and ( C Y ) X {(CY)^X} are closed in ( C Y ) X {(CY)^X} and ( C Y ) C X {(CY)^{CX}} respectively. Finally, it is shown that, under certain conditions, some elements of X Y {X^Y} may be considered as elements of ( C Y ) X {(CY)^X} and that the induced 1 1 - 1 1 function between the subspaces is open.

Keywords

Function spaces in general topology, Set-valued maps in general topology

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
bronze