381 reputation
19
bio website
location Universidade de São Paulo, Brazil
age 29
visits member for 2 years, 3 months
seen Mar 21 '13 at 20:24

I am currently a post-doc at the Physics department at the University of Sao Paulo. My interests are in Statistical Physics, stochastic processes and magnetism. More importantly, I really value simple and solid explanations to important problems in any science.


Jul
25
awarded  Scholar
Jul
25
accepted Book suggestion for linear algebra “2”
Jul
25
comment Distance between discrete random variables
Mr. Schmuland, thank you for your answer Indeed, I was interpreting $Y$ as signifying the G's in your answer, thinking they could all be treated as a single variable. Is that impossible? This confuses me: suppose I take the limit of both $n$ and $k$ going to $\infty$, but such that k/n remains fixed. Then $Y$ represents E(G's)? Thank you again for your time.
Jul
25
awarded  Commentator
Jul
25
comment Distance between discrete random variables
Hi @joriki. I really appreciate the answer, but not only did I not understand your argument, but computer simulations I have performed also show a clearly non-linear PMF. Also, in your explanation, where does the fact that there has been k draws enter? This is clearly relevant (taking, for instance, the extreme cases $k=1$ and $k=n$). Thanks again for the attention.
Jul
25
comment Distance between discrete random variables
Yes. Uniformou, Butantã without juxtaposition or the results (not sure what the name for this is)
Jul
25
asked Distance between discrete random variables
Jul
21
comment Conditions for the equivalence of $\mathbf A^T \mathbf A \mathbf x = \mathbf A^T \mathbf b$ and $\mathbf A \mathbf x = \mathbf b$
Note: $A^TAx=A^Tb$ is more well behaved and perhaps easier to solve. It is symmetric and positive definite (or perhaps semi-definite).
Jul
21
asked Book suggestion for linear algebra “2”
Jul
19
answered Numerical Methods for Linear Matrix Equation
Jul
18
revised Approximate solution for the root of a non-linear function
deleted 2 characters in body
Jul
18
comment Approximate solution for the root of a non-linear function
Oh my! I am sorry Leonid, you are right. My mistake. The RHS may be both pos. and neg. I will correct that in the question.
Jul
18
asked A MatrixExp question: simplifying $\int_0^t e^{A(t-t')} e^{A^T (t-t')} dt'$ for a real matrix A
Jul
18
awarded  Editor
Jul
18
revised Approximate solution for the root of a non-linear function
added 954 characters in body
Jul
18
comment Approximate solution for the root of a non-linear function
Hi, I really appreciate the answer. So: only the first root is of interest. The parameters are all positive and have the following usual ranges: $0<b<2$, $0<g<10$ and $0<\omega<10$. This is approximate, but shows they are not very different from one another. I will edit the question to post a slightly more general panorama of the question.
Jul
17
answered inequality on inner product
Jul
17
awarded  Supporter
Jul
17
awarded  Teacher
Jul
17
answered Application of the Chebyshev inequality