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TheNotMe

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16 easier way of calculating the determinant for this matrix Mar 21 '13
15 Prove/disprove: if $\det(A+X) = \det(B + X)$ for all $X$, then $A=B$ May 6 '13
14 Proving that $\frac{(k!)!}{k!^{(k-1)!}}$ is an integer Apr 10 '13
10 Prove that in a tree with maximum degree $k$, there are at least $k$ leaves Jun 23 '13
9 Proving that $\sum\limits_{k=0}^{n} {{m+k} \choose{m}} = { m+n+1 \choose m+1 }$ [duplicate] Apr 10 '13
9 Prove that if $A$ is diagonalizable then there is a matrix $B$ such that $B^{2012} = A$ May 2 '13
8 Number of numbers $ 0 \leq n \leq 10,000,000$ such that the sum of the digits is at most $34$ May 14 '13
7 In a random graph of $n$ vertices, what is the expected value of the number of simple paths? Jun 19 '13
7 For which $\alpha$ this sum converges? $\sum_{n=3}^{\infty} {\frac{1}{n \cdot \ln(n) \cdot \ln(\ln(n))^{\alpha}}}$ May 29 '13
7 Evaluating $\sum_{n=1}^{\infty} {(-1)^n \cdot \frac{2^{2n-1}}{(2n+1)\cdot 3^{2n-1}}}$ Jul 4 '13
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