Sangchul Lee
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# 45,112 Reputation

105 today
 +55 5 hours ago 5 events $\sum_{n=1}^{50}\arctan\left(\frac{2n}{n^4-n^2+1}\right)$ +50 55 mins ago 5 events Closed form for $\int_0^{\infty}\sin(x^n)\mathbb{d}x$
90 yesterday
 +45 11:24 4 events $L^2([-1, 1])$, we have $\lim_{j \to \infty} f_j(x) = 1$ for a.e. $x \in [-1, 1]$? +10 20:26 upvote A math contest problem $\int_0^1\ln\left(1+\frac{\ln^2x}{4\,\pi^2}\right)\frac{\ln(1-x)}x \ \mathrm dx$ +10 16:22 upvote Integral $\int_0^\infty\text{Li}_2\left(e^{-\pi x}\right)\arctan x\,dx$ +10 10:53 upvote Integral $\int_0^1\frac{\arctan^2x}{\sqrt{1-x^2}}\mathrm dx$ +10 02:16 upvote Asymptotic formula for d(n)/n summation +5 02:11 upvote Abelian theorem regarding Riesz summability
20 2 days ago
 +10 10:47 upvote $\sum_{k=1}^n \lfloor kx \rfloor =$ ? +10 10:47 upvote Evaluation of a cauchy Singular Integral
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