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Mathematics
Hans Lundmark's user avatar
Hans Lundmark's user avatar
Hans Lundmark's user avatar
Hans Lundmark
  • Member for 15 years, 3 months
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answer
401
Different ways to prove $\sum_{k=1}^\infty \frac{1}{k^2}=\frac{\pi^2}{6}$ (the Basel problem)
Oct 30, 2010
answer
193
How do I get the square root of a complex number?
Jun 10, 2011
answer
128
An Introduction to Tensors
Nov 15, 2010
answer
128
Derivative of sigmoid function $\sigma (x) = \frac{1}{1+e^{-x}}$
Nov 3, 2011
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97
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?
Jan 18, 2011
answer
83
Funny identities
Nov 4, 2010
answer
72
Different ways to prove $\sum_{k=1}^\infty \frac{1}{k^2}=\frac{\pi^2}{6}$ (the Basel problem)
Nov 1, 2010
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72
What does E mean in 9.0122222900391E-5?
Oct 7, 2010
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71
lim sup and lim inf of sequence of sets.
Sep 2, 2016
answer
56
Why do different calculators disagree on $\cos(452175521116192774 )$?
May 28, 2022

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Disable "share a link" popup?
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Using Taylor expansion on a limit tagged "without L'Hospital"
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"New comments posted" notification when writing answers?
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List of Generalisations of Common Questions

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Bold math: Automatic choice between \mathbf and \boldsymbol for Latin and Greek symbols?
18
Strengthening the induction hypothesis
13
Are there other nice math books close to the style of Tristan Needham?
12
"Wild" solutions of the heat equation: how to graph them?
11
LaTeX template for resume/curriculum vitae