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 Yearling
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Feb
6
comment Simple factorials
I'm not an expert on this so I will post this as a comment: Have you tried the Stirling Approximation? It might not give you the correct value but it is usefull to do calculations with factorials such as large binomial coefficients.
Feb
6
comment Differential Equation - Blood Alcohol
Are you sure? At $t=0$ your solution is $0$! So the person is sober. :-)
Jan
26
accepted Equality Constraints in Quadratic Programming
Jan
23
comment Equality Constraints in Quadratic Programming
@MichaelGrant Well, you are probably right. The fact is, I want to explore SOCP in more detail and I am looking for open source software projects (non-commercial) on this topic. Even worse, I want to understand the methods used at least concept-wise. If you could point me to the algorithms actually used in practice (from your profile page I am quite sure you know all about them) I would be more than happy to look at them instead! Unfortunately, all R packages with SOCP solvers use this exact 1995 code!
Jan
23
asked Equality Constraints in Quadratic Programming
Jul
13
awarded  Yearling
Feb
5
comment Is it faster to count to the infinite going one by one or two by two?
@PaĆ­loEbermann Agreed, of course its all about the numbering of the sequence. We didn't properly define "slow". If we say "slow" means that it takes a longer time to spell the first $N$ members of the sequence then counting by two is slower, at least in binary it is. This is not a statement about the usual "slow" in mathematics: convergence speed.
Feb
5
awarded  Nice Answer
Feb
4
revised Is it faster to count to the infinite going one by one or two by two?
edited body
Feb
4
revised Is it faster to count to the infinite going one by one or two by two?
added 861 characters in body
Feb
3
answered Is it faster to count to the infinite going one by one or two by two?
Sep
24
comment Find $\mathbb E[(X+1)^2]$
It's $3\int_0^{\sqrt{3}-1}\frac{1}{1+x}dx = 3(\ln{(1+x)}\vert_{0}^{\sqrt{3}-1}) = 3\ln{\sqrt{3}}$
Sep
24
revised Help show/prove linear transformation
fancier latex
Sep
24
suggested approved edit on Help show/prove linear transformation
Sep
13
comment Show basin of attraction has only one connected component
You didn't use the polynomial of degree 2 yet... If you look at $f^\prime(z)$, how many critical points are there? Can a critical point lie both in $U$ and $V$?
Jul
13
awarded  Yearling
May
15
comment Prove that if a set $E$ is closed iff it's complement $E^{c}$ is open
@Dominic Michaelis Of course. Like you and Mariano Suarez-Alvarez said the definition is important. So user77107 simply proved a different characterization of closed.
May
15
revised Questions on Green's Theorem
some spelling and latex fixed
May
15
suggested approved edit on Questions on Green's Theorem
May
15
revised Why is this function continuous on $ x \in \mathbb{R} $ where $ x < 1 $?
fixed typo in question