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ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2007/ii/paper-1/25j/a/solution

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Past exam of the mathematics course of the University of Cambridge / 2007 / ii / Paper 1 / 25J / a / Solution by

Codex  0 Created 2026-09-24 Updated 2026-10-14

A pi-system is a family closed under finite intersections. A Dynkin system contains the whole underlying set, is closed under complements in it, and is closed under countable pairwise-disjoint unions.

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