5,296 reputation
619
bio website mrcactu5.herokuapp.com/…
location New York, NY
age 29
visits member for 3 years, 9 months
seen 1 hour ago

Data Scientist @ Explorer Media


Aug
18
accepted Log concavity of binomial coefficients: $ \binom{n}{k}^2 \geq \binom{n}{k-1}\binom{n}{k+1} $
Aug
13
asked Using continued fractions to well-approximate a quadratic form?
Aug
13
revised How can I find $\mathbb Z_4$ as an extension of $\mathbb Z_2$ by $\mathbb Z_2$?
added 2 characters in body
Aug
13
answered How can I find $\mathbb Z_4$ as an extension of $\mathbb Z_2$ by $\mathbb Z_2$?
Aug
9
answered Where does the “Visual Multiplication” technique originate from?
Aug
4
comment Rank of Elliptic Curves
as a service to other readers - especially me - please define the 2-Selmber rank in your question? And I don't know what you mean by "congruent number family".
Aug
4
revised Rank of Elliptic Curves
added 181 characters in body
Aug
4
comment Rank of Elliptic Curves
when you say Clearly it is not known that the 2-Selmer rank is bounded, but is it known that it is unbounded in the congruent number family? do you have a reference?
Aug
4
answered Rank of Elliptic Curves
Aug
4
comment What does the decomposition, weak union and contraction rule mean for conditional probability and what are their proofs?
@CharlieParker I was referring to a textbook on information theory by Raymond Yeung. slides from Daphne Koller's Coursera course suggest drawing the Bayesian net.
Aug
4
revised What does the decomposition, weak union and contraction rule mean for conditional probability and what are their proofs?
added 109 characters in body
Aug
3
answered What does the decomposition, weak union and contraction rule mean for conditional probability and what are their proofs?
Aug
2
answered Prove $\lim_{n\to\infty} \frac{(2^{2^n}+1)(2^{2^n}+3)(2^{2^n}+5)\cdots (2^{2^n+1}+1)}{(2^{2^n})(2^{2^n}+2)(2^{2^n}+4)\cdots (2^{2^n+1})}=\sqrt{2}$
Aug
2
answered $\frac{db^x}{dx}$ without $e$
Jul
30
comment Entropy of the product of two random variables
what are the dimensions of our matrix $X$? Are all the entries independent? What is the size of your vector $Y$? @Lembik
Jul
30
comment Prove or find a counter example to the claim that for all sets A,B,C if A ∩ B = B ∩ C = A ∩ C = Ø then A∩B∩C ≠ Ø
It's clearly... true? I think you are proving his result
Jul
29
comment How prove this $x_{1}+x_{2}+\cdots+x_{n}<\frac{5}{3}$
Here is my failed attempt: $$ (x_1 + \dots x_n)^2 = \sum_{i,j} x_i x_j \leq \sum_{i,j} 4^{-|i-j|} = n + 2 \big[ (n-1)\;4^{-1} + \dots + 1 \cdot4^{n-1} \big]$$
Jul
23
comment periodicity of an interval exchange transformation(IET)
Is the number of segments in the interval exchange finite?
Jul
22
revised Area of projection of cube in $\mathbb{Z}^3$ onto a hyperplane
added 279 characters in body; edited tags
Jul
22
comment Area of projection of cube in $\mathbb{Z}^3$ onto a hyperplane
@DanielRust I thought I was simplifying by using $[-1,1]^3$ instead of a unit cube which would be $[-\tfrac{1}{2}, \tfrac{1}{2}]$.