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The top documents tagged [number rpermutations]
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number rpermutations
4.6.2 Exponential generating functions The number of r-combinations of multiset S={n 1 ·a 1,n 2 ·a 2,…, n k ·a k } : C(r+k-1,r), generating function:
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4.6.2 Exponential generating functions
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