1,012 reputation
523
bio website about.me/LucasCAPS
location Rio de Janeiro, Brazil
age 26
visits member for 3 years, 7 months
seen Oct 17 at 18:09

Graduated in Applied Mathematics and taking Master's in Statistics at UFRJ.


May
14
comment A suspicious way to conclude convergence
Yes. I thought a real divergent sequence had to go to $\pm\infty$.
May
13
accepted A suspicious way to conclude convergence
May
13
comment A suspicious way to conclude convergence
Indeed, $S$ neither converges nor diverges.
May
12
asked A suspicious way to conclude convergence
May
7
comment Is there a need for another integration technique?
Next time I'll know better than to not draw the freaking region. =D
May
6
accepted Is there a need for another integration technique?
May
6
asked Is there a need for another integration technique?
May
6
awarded  Yearling
Apr
25
awarded  Informed
Apr
22
asked Trouble with geometrical application of Lagrange multiplier
Apr
6
awarded  Popular Question
Sep
21
comment Splitting field of a slightly general polynomial
I've done exercises with $x^n-a$, $n$ and $a\neq1$ known, and indeed, the Galois group does not turn out to be abelian. Based on your answer, I have another idea: when $a$ is $1$, $\omega\mapsto\omega^k$ is invertible if and only if $k$ is invertible modulo $n$; but the set of such numbers is an abelian group, so I could argue $\mathrm{Gal}(F)\simeq\mathbb Z_n^\times$.
Sep
20
asked Splitting field of a slightly general polynomial
Jul
25
comment Finding a pair of elements to satisfy an inequation
@JackSchmidt I had an insight as soon as I read your comment. A field is a domain, and this one has at least two non-zero distinct elements. Pretty easy, I should've thought of that by myself. Thanks.
Jul
25
accepted Finding a pair of elements to satisfy an inequation
Jul
25
asked Finding a pair of elements to satisfy an inequation
Jul
24
accepted A sequence of nested fractions with a counter-intuitive limit
Jul
17
accepted How many elements of a given order in a finite group
Jul
15
asked How many elements of a given order in a finite group
Jun
8
awarded  Caucus