287 reputation
18
bio website superuser.com/users/5003/dan
location United States
age 29
visits member for 4 years, 2 months
seen yesterday

1d
awarded  Nice Question
Sep
3
revised Get $5$ by doing any operations with four $7$s
fewer 7's based on Darth's suggestion; added 46 characters in body
Sep
3
answered Get $5$ by doing any operations with four $7$s
Jun
26
comment How to calculate these totient summation sums efficiently?
Wouldn't enumerating the Farey sequence using a recursive technique be of order of the length of the Farey Sequence, \sum_{n=1}^N \phi(n) and not of order N?
Apr
14
answered Dimension of solution space has 3 vectors but 6 components?
Apr
14
comment How do I add two independent probability functions?
Your probability density functions (pdf) pd_1 and pd_2 don't match your description of being "uniform". It seems like your mixing and matching probability distribution with cumulative distributions. For the pdf (prob(X=x)) it should be 0, then some constant for a period (1/length of period), then back to 0 because all non-zero times should have equal probability for it to be "uniform". If you look at the cumulative probability (prob(X>x)) of these it would be 0, then x/(length of period), then 1 afterwords.
Mar
15
awarded  Popular Question
May
23
awarded  Yearling
Apr
9
comment How many numbers of the form $p_1^2 p_2 p_3$ are there less than $10^{15}$ for $p_1$, $p_2$, $p_3$ distinct primes?
Exact. It'll need to work with other power combinations. It doesn't necessarily have to be able to go up to 10^{15}, but the higher I can get an exact answer the better.
Apr
8
asked How many numbers of the form $p_1^2 p_2 p_3$ are there less than $10^{15}$ for $p_1$, $p_2$, $p_3$ distinct primes?
Mar
30
accepted Are there sequences in which you can prove there are no closed form?
Mar
30
accepted Random Walk solution shortcut
Mar
30
accepted Heronian triangle Generator
Feb
28
awarded  Teacher
Feb
27
answered Heronian triangle Generator
Feb
27
asked Heronian triangle Generator
Dec
7
awarded  Scholar
Dec
7
accepted Number of ways to put $n$ unlabeled balls in $k$ bins with a max of $m$ balls in each bin
Dec
7
awarded  Editor
Dec
7
revised Number of ways to put $n$ unlabeled balls in $k$ bins with a max of $m$ balls in each bin
added 562 characters in body