Mathematics
ryang
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22
Proof that no permutation can be expressed both as the product of an even number of transpositions and as a product of an odd number of transpositions
Dec 27 '11
17
The definition of locally Lipschitz
Oct 8 '13
17
Extra solutions when solving $\sin\theta+\cos\theta=\sqrt{2\sin2\theta}$
Sep 27
16
Relation between cross-product and outer product
Aug 13 '12
14
An inequality from Littlewood's Miscellany
Jun 11 '13
11
A non-square matrix with orthonormal columns
Aug 14 '12
11
If x = 1, then x + 1 = 5. Is it a logical proposition?
Aug 24
10
Why do we assume that this quadratic has one solution?
Aug 15
10
Why $x^0=\frac{\pi x}{180}c$?
Jul 6
10
If instantaneous rates of change aren't that rigorous, how correct is the usage of instantaneous rates of change (like velocity) by physicists?
Oct 7
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Is there a virtue to learning how to compute by hand?
7
What does vaccine efficacy mean?
6
Difficulty in explaining sample space
5
Questions about proofs

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