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ᴊ ᴀ s ᴏ ɴ
I'm deeply impressed by mathematics.
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Top Questions
68
votes
Strategies to denest nested radicals $\sqrt{a+b\sqrt{c}}$
algebra-precalculus
proof-writing
radicals
nested-radicals
asked Sep 15, 2012 at 14:00
math.stackexchange.com
32
votes
Are there any interesting surreal constants?
set-theory
surreal-numbers
asked Jun 3, 2017 at 14:57
mathoverflow.net
27
votes
Seems that I just proved $2=4$.
fake-proofs
paradoxes
tetration
power-towers
asked May 11, 2013 at 12:42
math.stackexchange.com
26
votes
Find all $n>1$ such that $\frac{2^n+1}{n^2}$ is an integer.
number-theory
asked Sep 28, 2012 at 13:21
math.stackexchange.com
23
votes
Show that $\sqrt[3]{2+\frac {10} 9\sqrt 3}+\sqrt[3]{2-\frac {10} 9\sqrt 3}=2$
radicals
asked May 9, 2013 at 10:10
math.stackexchange.com
23
votes
Is every minimal hypersurface in $S^n$ algebraic?
ag.algebraic-geometry
riemannian-geometry
real-algebraic-geometry
minimal-surfaces
asked Mar 15, 2020 at 17:28
mathoverflow.net
19
votes
When will $AB=BA$?
matrices
asked Aug 29, 2013 at 7:11
math.stackexchange.com
19
votes
Show that $\frac 1 {\sqrt{x+y}}+\frac 1 {\sqrt{y+z}}+\frac 1 {\sqrt{z+x}}\geq2+\frac 1 {\sqrt2}$.
inequality
asked Jun 7, 2013 at 9:17
math.stackexchange.com
19
votes
Simplify $\sqrt {\sqrt[3]{5}-\sqrt[3]{4}}$.
algebra-precalculus
radicals
nested-radicals
asked Sep 11, 2012 at 8:00
math.stackexchange.com
17
votes
Evaluate $\int \cos(\cos x)~dx$
calculus
integration
indefinite-integrals
asked Mar 7, 2012 at 14:17
math.stackexchange.com
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Top Answers
67
Why does $\tan^{-1}(1)+\tan^{-1}(2)+\tan^{-1}(3)=\pi$?
math.stackexchange.com
21
Show that $d/dx (a^x) = a^x\ln a$.
math.stackexchange.com
10
How to simplify an expression like this: $(x^2+x^{-2}-2)^{1/2}$
math.stackexchange.com
10
Evaluating tetration to infinite heights (e.g., $2^{2^{2^{2^{.^{.^.}}}}}$)
math.stackexchange.com
6
What is the value of $\frac{\mathrm d} {\mathrm dx}\sqrt{1/e^x}$?
math.stackexchange.com
6
How to prove two trigonometric identities
math.stackexchange.com
5
Help with following equality
math.stackexchange.com
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