User user16117 - Academia Stack Exchange

user16117

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Espoo, Finland

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Sucede que me canso de ser león...

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May 6

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9

Examples of Manifolds such that $\chi (X)=-3$

7

Proof of identity relating Prime-counting function and Stirling numbers of the second kind

7

Help in simplifying combinatorial sum $\frac{n!}{(n-k)!}-{1\over(n-k)!}{\sum _{m=1}^{k-1} (-1)^{m+1} (n-m)! S(k,k-m)}$

7

If a power of 2 divides a number, under what conditions does it divide a binomial coefficient involving the number that it divides?

7

Can this be proved using Combinatorics or generating functions?

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