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Mathematics
Jean-Claude Arbaut's user avatar
Jean-Claude Arbaut's user avatar
Jean-Claude Arbaut's user avatar
Jean-Claude Arbaut
  • Member for 11 years, 9 months
  • Last seen more than a month ago
  • Besançon, France
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70
Why are the trig functions versine, haversine, exsecant, etc, rarely used in modern mathematics?
Apr 17, 2019
43
In plain language, what's the significance of a field?
Sep 11, 2014
39
How to prove Fibonacci sequence with matrices?
May 7, 2014
27
How can you derive $\sin(x) = \sin(x+2\pi)$ from the Taylor series for $\sin(x)$?
Apr 14, 2015
26
Which polynomials fix the unit circle?
Aug 25, 2014
25
Process to show that $\sqrt 2+\sqrt[3] 3$ is irrational
Aug 30, 2014
23
How to prove that $f(f(x))=-x$ implies that $f$ is not continuous?
Nov 29, 2013
22
Scalar product and uniform convergence of polynomials
Dec 19, 2013
22
What are primitive roots modulo n?
May 15, 2014
21
Value of $f'(0)$ if $f(x)=\frac{x}{1+\frac{x}{1+\frac{x}{1+\ddots}}}$
Dec 19, 2013
Top Meta posts
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36
Policy on smileys?
33
Feature suggestion: marking an edit as minor to avoid messing with the question flow
31
What's with these "sangaku" geometry problems?
17
Copy of Wikipedia in tag wiki
15
Copyright and proof