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mathsub.com on X: "The topological definition of a continuous function involves preimages of open and closed sets. #MathGRE #Analysis #Topology https://t.co/mqheb4R2kS" / X
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Why are the sets U and V pictured open? My understanding is that X is inheriting the subspace topology from R^2. So the basis elements are rectangles of R^2 intersecting with the
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Closed Set Definition, Applications & Examples - Video & Lesson Transcript | Study.com
Closed Set Definition, Applications & Examples - Video & Lesson Transcript | Study.com
Criterion for a Set of a Topological Space to be Closed - Mathonline
