User user16117 - Academia Stack Exchange

user16117

Member for 1 year, 3 months
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Espoo, Finland

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Sucede que me canso de ser león...

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May 6, 2021

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10

Give combinatorial a proof that $\binom{n}{2}^2=\binom{n}{2}+6\binom{n}{3}+6\binom{n}{4}$

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

Prove that $(-1)^n \text{Laguerre}_n(2) \leq 1$.