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#inclusion–exclusion_principle

Inclusion–exclusion principle

Counting technique in combinatorics

In combinatorics, a branch of mathematics, the inclusion–exclusion principle is a counting technique which generalizes the familiar method of obtaining the number of elements in the union of two finite sets; symbolically expressed as

Tue 10th

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Inclusion–exclusion principle Addition principle Inclusion Euler characteristic Exclusion principle Combinatorial principles Sieve theory Set (mathematics) Derangement Euclid's theorem
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