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Jun
17
revised Calculate area under a curve
rolled back to a previous revision
Jun
17
revised Calculate area under a curve
added 32 characters in body
Jun
17
awarded  Enlightened
Jun
17
revised Show that $f(x+y)=f(x)+f(y)$ implies $f$ continuous $\Leftrightarrow$ $f$ measurable
better title, improved formatting; edited title
Jun
17
answered Calculate area under a curve
Jun
16
awarded  Mortarboard
Jun
16
answered What is a “hierarchical random graph”?
Jun
16
awarded  Nice Answer
Jun
16
answered Why isn't $ SA_{\text{cube}} = 3x^2 $?
Jun
16
revised How to normalize a set of real numbers?
added 22 characters in body
Jun
16
answered How to normalize a set of real numbers?
Jun
16
comment Counting words of varying length made out of a restricted alphabet
$n$ is the number of symbols (a, b, c, ...) and $y$ is the maximum word length you are considering. So for symbols (a,b) and words of length two or less, you have $n=2$ and $y=2$. Here $i$ is a dummy variable used for the summation.
Jun
16
revised Counting words of varying length made out of a restricted alphabet
deleted 9 characters in body
Jun
16
comment Tribonacci sequence modulo X
Yes, that is correct.
Jun
16
comment Tribonacci sequence modulo X
Interestingly (in the sense that I wouldn't have guessed this) it appears that $\varphi(m)$, the worst-case run time to calculate the period of the Tribonacci sequence mod $k$ for $k<m$, scales like $\varphi(m)\sim m^2$, rather than $m^3$. Bonus points for an explanation of why this is :)
Jun
16
comment Tribonacci sequence modulo X
You're right, thanks. I edited the algorithm to make it correct (which has the unfortunate side effect that the comments no longer make sense - sorry about that.)
Jun
16
revised Tribonacci sequence modulo X
deleted 92 characters in body; deleted 2 characters in body; edited body
Jun
16
answered Tribonacci sequence modulo X
Jun
16
revised Tribonacci sequence modulo X
added 3 characters in body; edited title; added 9 characters in body
Jun
15
revised Probability of market movement / Trends
added 4 characters in body; added 12 characters in body