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Américo Tavares's user avatar
Américo Tavares's user avatar
Américo Tavares's user avatar
Américo Tavares
  • Member for 13 years, 11 months
  • Last seen more than a week ago
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About

I am a retired Portuguese electrical engineer. Find out more on my blog, Problemas e Teoremas. Some contributions to MSE (pdf, July 2020)

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profile for Américo Tavares on Stack Exchange, a network of free, community-driven Q&A sites

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258
Different ways to prove $\sum_{k=1}^\infty \frac{1}{k^2}=\frac{\pi^2}{6}$ (the Basel problem)
Oct 30, 2010
81
What is the Jacobian matrix?
Dec 20, 2010
70
Nice proofs of $\zeta(4) = \frac{\pi^4}{90}$?
Mar 21, 2011
59
What is the importance of Calculus in today's Mathematics?
Aug 17, 2011
51
What is the result of $\infty - \infty$?
Aug 30, 2011
50
Is $\sqrt[3]{p+q\sqrt{3}}+\sqrt[3]{p-q\sqrt{3}}=n$, $(p,q,n)\in\mathbb{N} ^3$ solvable?
Apr 27, 2013
47
Evaluation of Gaussian integral $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx$
Nov 7, 2010
47
What does closed form solution usually mean?
Nov 6, 2010
46
Is there a general formula for solving Quartic (Degree $4$) equations?
Aug 15, 2011
38
Teenager solves Newton dynamics problem - where is the paper?
Jun 7, 2012
Top Meta posts
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130
MathJax basic tutorial and quick reference
126
MathJax basic tutorial and quick reference
27
What is the purpose of this site?
12
Creating diagrams
11
When does a post become a Community Wiki post?
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30
Do foreign acronyms take a definite article, and of which gender?
28
How to draw the calculation of a determinant?
26
O que é e como se pronuncia "fixe"?
25
How to create posters using LaTeX
24
How to draw these (closed contours) diagrams using TikZ or PSTricks?