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Mathematics
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VividD
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Pearls I found on this site

Can an irrational number raised to an irrational power be rational?

A (probably trivial) induction problem: $\sum_2^nk^{-2}\lt1$

Innocent-looking Diophantine equation with smallest solution of the order $10^{50}$?

Picture/intuitive proof of $\cos(3 \theta) = 4 \cos^3(\theta)-3\cos(\theta)$?

Proving a trigonometric identity: $\frac{\cos x}{1-\sin x} -\tan x = \sec x$

Cover a plane with parabolas and hyperbolas

What is the (mathematical) point of straightedge and compass constructions?

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View all questions and answers
695
Splitting a sandwich and not feeling deceived
Jan 14, 2014
111
Fibonacci number that ends with 2014 zeros?
Jul 19, 2014
99
Unusual mathematical terms
Jan 13, 2015
81
Visual proof of $\sum_{n=1}^\infty \frac{1}{n^4} = \frac{\pi^4}{90}$?
May 15, 2015
47
Is $n! + 1$ often a prime?
Jul 1, 2014
45
Is ${F_{n}}^2 - 28$ always a composite number?
Jan 4, 2015
45
Is ${F_{n}}^2 - 28$ always a composite number?
Jan 4, 2015
44
Only 12 polynomials exist with given properties
Apr 18, 2015
36
Can you be 1/12th Cherokee?
Jan 18, 2015
32
For the Fibonacci numbers, show for all $n$: $F_1^2+F_2^2+\dots+F_n^2=F_nF_{n+1}$
Sep 1, 2015
Top Meta posts
5
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Bounty on a "Community wiki" question - what will happen?
4
Is it possible to vote more than 40 times a day?
4
VoxPopuli badge vs 30 vote daily limit
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118
Generating visually pleasing circle packs
78
Writing a word with straight lines
48
QEMU - Code Flow [ Instruction cache and TCG]
30
Is this really a golden ratio spiral?
29
Drawing pairs (planar graph, circle packing)