Combinatorics
Combinatorics is the study of counting. The two most basic and fundamental ideas are that of permutations and combinations. A important result of counting techniques is the formulation of the Principle of Inclusion-Exclusion (PIE).
Combinatorics is the study of counting. The two most basic and fundamental ideas are that of permutations and combinations. A important result of counting techniques is the formulation of the Principle of Inclusion-Exclusion (PIE).
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