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shcolf

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 5 years, 3 months
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  • Last seen Mar 28 at 7:59

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6 Evalute big determinant Jun 1 '15
6 Prove that formula is satisfiable in some infinite structure, but invalid in all finite structures Dec 16 '17
5 Proving inequality $\frac{n}{2} < 1 + \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} + … + + \frac{1}{2^{n}-1} < n$ Dec 27 '14
5 How to prove $\sum_{k=1}^{n}k\binom{n}{k} = n2^{n-1}$ [duplicate] Dec 29 '14
4 Compute $\int_{0}^{\infty}\frac{x \log(x)}{(1+x^2)^2}dx$ Apr 17 '15
4 General solution, Canonical form of PDE May 9 '17
3 Find number of solutions of $x_1 \wedge x_2 \oplus x_2 \wedge x_3 \oplus … \oplus x_{n-1} \wedge x_n = 1$ Dec 6 '16
3 Laurent series expansion of $\frac{z^2-1}{z^2+1}$ May 18 '16
3 Construct a bijection between $[0,1]$ and $[0,1] \cup [2,3] \cup [4,5] \cup …$ Oct 25 '16
3 Solving hyperbolic partial differential equation Mar 18 '17
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