Mathematics
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ryang
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All Questions Answers
Score Newest
question
25
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, 2011
answer
23
What is wrong with the following u-substitution?
Nov 13, 2017
answer
22
Extra solutions when solving $\sin\theta+\cos\theta=\sqrt{2\sin2\theta}$
Sep 27, 2021
question
22
The definition of locally Lipschitz
Oct 8, 2013
question
20
Relationship between cross product and outer product
Aug 13, 2012
answer
18
Is this alternative proof that $\sqrt 2$ is irrational sound?
Jun 15, 2022
answer
16
If $x = 1$, then $x + 1 = 5$. Is it a logical proposition?
Aug 24, 2021
question
14
An inequality from Littlewood's Miscellany
Jun 11, 2013
question
14
A non-square matrix with orthonormal columns
Aug 14, 2012
answer
13
How can I avoid the wrong solution when squaring both sides of an equation?
Jul 24, 2022
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