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4 Questions

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3
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Stanley's Enumerative Combinatorics Question help

combinatorics permutations
mar 10 at 10:18 Gerry Myerson 85.6k
 
2
votes
1
answer
45
views

Smallest $n$ for which, we can have $k$ distinct subsets of $[n]$ such that no two of them have empty intersection

combinatorics
feb 19 at 13:22 Asaf Karagila 90k
 
2
votes
1
answer
66
views

Count the subsets of [n] whose sum is modulo $2^k$

combinatorics number-theory
feb 15 at 6:46 Novice 115
 
1
vote
1
answer
33
views

Balls, Bags, Partitions, and Permutations

combinatorics partitions
mar 21 at 11:15 Marc van Leeuwen 23.5k
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