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Olives

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162 reputation
4
bio website
location Vancouver, Canada
age 25
visits member for 1 year, 7 months
seen Aug 29 '12 at 21:59
stats profile views 8

162 reputation
 bio website visits member for 1 year, 7 months
4 badges
 location Vancouver, Canada seen Aug 29 '12 at 21:59
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4 Questions

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5
 Minimum Universe size in set system with constraints.
4
 Proof of a combinatorial identity: $\sum_{i=0}^n {2i \choose i}{2(n-i)\choose n-i} = 4^n$ [duplicate]
2
 Are matrices commutable if $ABv=BAv$?
0
 Divisibility with sums going to infinity

162 Reputation

+20 Proof of a combinatorial identity: $\sum_{i=0}^n {2i \choose i}{2(n-i)\choose n-i} = 4^n$
+25 Minimum Universe size in set system with constraints.
+10 Are matrices commutable if $ABv=BAv$?

0 Answers

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5 Tags

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combinatorics × 2
0
generating-functions
0
binomial-coefficients
0
matrices
0
infinity

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