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Tagged with multiset co.combinatorics
3 questions with no upvoted or accepted answers
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Partitions of a multiset into equal parts
I am interested in a possible generalization of the following fact from combinatorics:
If $n<m$ then there are at least as many ways to partition a set of size $nm$ into $m$ sets each of size $n$ ...
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A natural sum over multisets (expectation over multinomial)
I think this is a natural question but am not sure where to find resources.
Consider the possible multisets arising from choosing $n$ times an item from one of $k$ categories. We can represent one ...
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3D generalization of Gaussian q-binomial coefficient
It is known that the coefficient of $q^t$ in Gaussian binomial coefficient $\binom{m+n}m_q$ equals the number of permutations of the multiset $\{0^m, 1^n\}$ with $t$ inversions.
Is there a closed ...