Indiscrete space: Difference between revisions
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In [[topology]], an '''indiscrete space''' is a [[topological space]] with the '''indiscrete topology''', in which the only open [[subset]]s are the empty subset and the space itself. | In [[topology]], an '''indiscrete space''' is a [[topological space]] with the '''indiscrete topology''', in which the only open [[subset]]s are the empty subset and the space itself. | ||
==Properties== | ==Properties== | ||
Revision as of 15:04, 4 January 2013
In topology, an indiscrete space is a topological space with the indiscrete topology, in which the only open subsets are the empty subset and the space itself.
Properties
- An indiscrete space is metrizable if and only if it has at most one point
- An indiscrete space is compact.
- An indiscrete space is connected.
- Every map from a topological space to an indiscrete space is continuous.
References
- Lynn Arthur Steen; J. Arthur Seebach jr (1978). Counterexamples in Topology. Berlin, New York: Springer-Verlag. ISBN 0-387-90312-7.