1,043 reputation
814
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location Brazil
age
visits member for 4 years, 8 months
seen 6 hours ago

I'm a graduat student at the Instituto de Matemática Pura e Aplicada (IMPA), Rio de Janeiro, Brazil.

email: [the shortest string of letters containing my first name and last name as substrings]@gmail.com


Oct
14
revised Does for every vector field there always exist a volume form for which the vector field is a homothety?
added 15 characters in body
Oct
14
revised Does for every vector field there always exist a volume form for which the vector field is a homothety?
added 40 characters in body
Oct
14
answered Does for every vector field there always exist a volume form for which the vector field is a homothety?
Oct
14
revised Manifolds admitting flat connections
edited body
Oct
14
revised Manifolds admitting flat connections
added 8 characters in body
Oct
14
revised Manifolds admitting flat connections
added 8 characters in body
Oct
13
comment Manifolds admitting flat connections
I corrected the "symmetric flat" thing. I like the idea of using Cartan-Hadamard to prove that spheres don't admit torsionfree flat connections. This saves the task of proving that only toruses admit free $\mathbb R^n$ actions, which is something I didn't do in my answer.
Oct
13
revised Manifolds admitting flat connections
added 164 characters in body
Oct
12
answered Manifolds admitting flat connections
Sep
24
awarded  Autobiographer
Sep
12
comment Does anyone know an intuitive proof of the Birkhoff ergodic theorem?
If $f\equiv 1$ and $T=I$ we have $M_T'\equiv+\infty$, so the recurrence formula is $+\infty + f=+\infty$, which is useless. Am I missing something?
Aug
23
awarded  Nice Answer
Aug
12
revised real symmetric matrix has real eigenvalues - elementary proof
added 391 characters in body
Aug
12
revised real symmetric matrix has real eigenvalues - elementary proof
added 391 characters in body
Aug
12
revised real symmetric matrix has real eigenvalues - elementary proof
added 391 characters in body
Aug
6
revised real symmetric matrix has real eigenvalues - elementary proof
added 1 character in body
May
28
awarded  Necromancer
May
27
awarded  Yearling
May
27
answered Can the unsolvability of quintics be seen in the geometry of the icosahedron?
May
6
awarded  Popular Question