Mathematics
achille hui's user avatar
achille hui's user avatar
achille hui's user avatar
achille hui
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Look deep into my icon, you will see the answer.

Take a prime that's not a prime, what needs to make it ninety nine.

L'enfer est plein de bonnes volontés ou désirs - sci.math has been killed by crackpots, I predict math.SE will be killed by over-spontaneous-moderation (2018/12/10)

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97
Conjecture $\int_0^1\frac{\mathrm dx}{\sqrt{1-x}\ \sqrt[4]x\ \sqrt[4]{2-x\,\sqrt3}}\stackrel?=\frac{2\,\sqrt2}{3\,\sqrt[8]3}\pi$
Oct 31, 2013
answer
73
Is $0.1010010001000010000010000001 \ldots$ transcendental?
May 5, 2014
answer
70
Integral $\int_0^1\frac{\ln\left(x+\sqrt2\right)}{\sqrt{2-x}\,\sqrt{1-x}\,\sqrt{\vphantom{1}x}}\mathrm dx$
Mar 15, 2014
answer
67
Does non-symmetric positive definite matrix have positive eigenvalues?
Mar 9, 2013
answer
65
What are some examples of mathematics that had unintended useful applications much later?
Sep 7, 2013
answer
56
Conjecture $\int_0^1\frac{dx}{\sqrt[3]x\,\sqrt[6]{1-x}\,\sqrt{1-x\left(\sqrt{6}\sqrt{12+7\sqrt3}-3\sqrt3-6\right)^2}}=\frac\pi9(3+\sqrt2\sqrt[4]{27})$
Feb 28, 2014
answer
53
Find $xy+yz+zx$ given systems of three homogenous quadratic equations for $x, y, z$
Feb 9, 2018
answer
52
Why does Wolframalpha think that this sum converges?
Mar 1, 2016
answer
48
Prove that there exists a triangle which can be cut into 2005 congruent triangles.
Nov 26, 2018
answer
48
How does one [easily] calculate $\sum\limits_{n=1}^\infty\frac{\mathrm{pop}(n)}{n(n+1)}$?
Jun 29, 2013
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