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Mathematics
Quang Hoang's user avatar
Quang Hoang's user avatar
Quang Hoang's user avatar
Quang Hoang
  • Member for 12 years, 8 months
  • Last seen more than a week ago
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Learning to code

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Top posts

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35
Proving that the sum of any two sides of the triangle is greater than the third side
Aug 1, 2016
27
Every Group is a Fundamental Group
Sep 21, 2014
17
Can an idempotent matrix be complex?
Mar 30, 2017
17
APICS Mathematics Contest 1999: Prove $\sin^2(x+\alpha)+\sin^2(x+\beta)-2\cos(\alpha-\beta)\sin(x+\alpha)\sin(x+\beta)$ is a constant function of $x$
Jul 24, 2016
17
Show that $1^k+2^k+3^k+ \ldots +n^k$ is divisible by $ 1+2+3+ \ldots +n$
Oct 8, 2015
17
Is ABC an equilateral triangle
Sep 7, 2014
17
Cevians $AD$, $BE$, $CF$ are concurrent, as are cevians $DP$, $EQ$, $FR$; show that $AP$, $BQ$, $CR$ are concurrent
Dec 14, 2018
13
Show that $\operatorname{diam}(A\cup B)\le \operatorname{diam}(A)+\operatorname{diam}(B)+d(A,B)$
Sep 15, 2014
13
Decide convergence divergence of $\sum \dfrac{1}{(\ln n)^{\ln n}}$
Aug 2, 2014
12
Multivariable version of the extreme value theorem
Jul 29, 2014

Top network posts

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67
convert datetime64[ns, UTC] pandas column to datetime
57
cmake error 'the source does not appear to contain CMakeLists.txt'
41
Error: ValueWarning: A date index has been provided, but it has no associated frequency information and so will be ignored when e.g. forecasting
36
How to find the average of the differences between all the numbers of a Python List
34
Reorder certain columns in pandas dataframe