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Mathematics
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angryavian
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77
Why is this 'Proof' by induction not valid?
Dec 21, 2016
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61
Why divide by $2m$
Aug 1, 2014
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49
Two definitions of $\limsup$
Jan 19, 2013
answer
45
'Trace trick' for expectations of quadratic forms
Apr 10, 2017
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40
What is the mathematical explanation for this trick?
Aug 1, 2014
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39
Mathematical writing: why should we not use the phrase "we have that"?
Jul 19, 2013
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30
Why does proof by contrapositive make intuitive sense?
Jul 25, 2016
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30
Is it possible to turn this geometric demonstration of the area of a circle into a rigorous proof?
May 29, 2021
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29
Invert the softmax function
May 18, 2018
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26
±1-random walk from 5 until 20 or broke
May 24, 2017

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OLD Requests for Reopen & Undeletion Votes (volume 07/2018 - 12/2020)
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OLD Requests for Reopen & Undeletion Votes (volume 01/2021 - 12/2021)
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Requests for Reopen & Undeletion Votes (volume 01/2022 - today)

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Why are density functions sometimes written with conditional notation?
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Voicing in the Finale of Tchaikovsky's Symphony No. 6 "Pathétique"
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The mean and variance of Poisson distribution are equal