User Américo Tavares - MathOverflow Meta

Américo Tavares

Member for 14 years
Last seen more than 2 years ago

problemasteoremas.wordpress.c…
Queluz, Lisbon, Portugal

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I am a retired Portuguese electrical engineer. Find out more on my blog, Problemas e Teoremas.

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Jun 25, 2013

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259

Different ways to prove $\sum_{k=1}^\infty \frac{1}{k^2}=\frac{\pi^2}{6}$ (the Basel problem)

81

What is the Jacobian matrix?

70

Nice proofs of $\zeta(4) = \frac{\pi^4}{90}$?

60

What is the importance of Calculus in today's Mathematics?

52

What is the result of $\infty - \infty$?