Américo Tavares

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bio website problemasteoremas.wordpress.c…
location Queluz, Portugal
age 62
visits member for 2 years, 9 months
seen 46 mins ago
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I'm a retired Portuguese electrical engineer.

You can contact me at acltavares[at]sapo[dot]pt

Blog Problemas Teoremas.

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2h
 reviewed Approve suggested edit on Regarding a well-known tensor product formula
5h
 revised How to prove to be an irrational number? Like $\sqrt{2}$ $\sqrt{3}$ or $\sum\limits_{k=1}^{\infty} \frac{1}{n^2}=\pi^2/6$
added 197 characters in body
7h
 reviewed Approve suggested edit on “Translating” one value $- \infty$ to $+ \infty$ to another ($+ \infty$ to $ \gt 0$)
7h
 revised How to prove to be an irrational number? Like $\sqrt{2}$ $\sqrt{3}$ or $\sum\limits_{k=1}^{\infty} \frac{1}{n^2}=\pi^2/6$
Added (number-theory) tag
7h
 revised Apéry's constant ($\zeta(3)$) value
added 19 characters in body
7h
 revised How to prove to be an irrational number? Like $\sqrt{2}$ $\sqrt{3}$ or $\sum\limits_{k=1}^{\infty} \frac{1}{n^2}=\pi^2/6$
added 19 characters in body
8h
 comment How to prove to be an irrational number? Like $\sqrt{2}$ $\sqrt{3}$ or $\sum\limits_{k=1}^{\infty} \frac{1}{n^2}=\pi^2/6$
@Gustavo Bandeira You are welcome.
8h
 revised How to prove to be an irrational number? Like $\sqrt{2}$ $\sqrt{3}$ or $\sum\limits_{k=1}^{\infty} \frac{1}{n^2}=\pi^2/6$
added 292 characters in body
8h
 comment How to prove to be an irrational number? Like $\sqrt{2}$ $\sqrt{3}$ or $\sum\limits_{k=1}^{\infty} \frac{1}{n^2}=\pi^2/6$
@GustavoBandeira No! The test above or a similar one provides a method but the difficulty is on how to construct such sequences $(a_n),(b_n)$.
8h
 answered How to prove to be an irrational number? Like $\sqrt{2}$ $\sqrt{3}$ or $\sum\limits_{k=1}^{\infty} \frac{1}{n^2}=\pi^2/6$
9h
 revised Integral of rational functions.
added 83 characters in body
9h
 revised Using a definite integral, to create a specific recurrence relation.
Corrected spelling typos and added (calculus) and (definite-integral) tag. Removed (abstract-algebra) tag
9h
 reviewed Approve suggested edit on Proof that the interior of any union of closed sets with empty interior in a compact Hausdorff space is empty
12h
 revised Integral of rational functions.
added 320 characters in body
13h
 reviewed Approve suggested edit on Differentiation - Limits Equal (Possibly MVT, Rolle's or L'Hopital)
13h
 revised Integral of rational functions.
Corrected spelling typo
13h
 comment Integral of rational functions.
Do you have a typo in 1? How do you complete the square in $\dfrac{1}{x^2+2px+q}$ to get $\dfrac{4}{(4q-4p)^2+(p+x)^2}$?
13h
 revised Integral of rational functions.
added 669 characters in body
14h
 reviewed Approve suggested edit on Value of series, Partialsum?
14h
 reviewed Approve suggested edit on Diffeomorphism from Inverse function theorem
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