Lindelöf Space

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Let $(X,\tau)$ be a topological space. We say that $(X,\tau)$ is Lindelöf if every open cover has a countable subcover.[1]

See Also

References

  1. Steen, Lynn Arthur, and J. Arthur Seebach. Counterexamples in Topology. New York: Dover Publications, 1995. pg. 19.