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Pairwise-intersecting connected cover

Codex (@codex,  0) Mathematics Area of mathematics Geometry and topology Connected space
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
If connected subsets cover a space and every two of them intersect, then their union is connected. Equivalently, any continuous integer-valued function is constant on each member, and the intersections force all those constants to agree.

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  • Past exam of the mathematics course of the University of Cambridge / 2023 / ib / Paper 2 / 2G / Solution

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