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user30523

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

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  • Member for 7 years, 9 months
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  • Last seen Jan 15 at 9:32

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5 Finding the period of $f(x) = \sin 2x + \cos 3x$ May 21 '15
4 Calculate the limit $\lim_{n \to \infty}\frac{ \ln(n)^{(\ln n)}}{n!}$ Apr 28 '16
4 Find $m,n$ so that $u(x,t)=t^mf(xt^n)$ is a solution to $u_t+uu_x=\nu u_{xx}$ Apr 25 '20
3 $T:X \to Y$ linear, $J:Y \to Z$ linear, injective and bounded such that $JT:X\to Z$ is bounded, too. Prove $T$ is bounded. Dec 12 '19
3 Functions $f_n:\mathbb{R}\to\mathbb{R}$ with $f_n \to 0 \text{ in } L^3, f_n\rightharpoonup 0 \text{ in } L^2, f_n \nrightarrow 0 \text{ in } L^2$ Feb 14 '20
3 Exact solution $\int_0^1 u'v'=v(1/2)$ Nov 6 '19
3 Combinatorial proof $n {2n \choose n} = (n+1) {2n \choose n+1}$ May 1 '15
3 Show $T:\mathbb{R}^n\to \mathbb{R}^m$ injective, surjective then $n\leq m$,$n\geq m$ respectively Nov 18 '16
3 Topology of the complex curve $x^4+y^4=1$ Feb 11 '16
3 Prove $\int_a^b f(x)f''(x) dx\leq0$ if $a<b$ and $f(a)=f(b)=0$ Dec 13 '16
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