Reputation
2,384
Next privilege 2,500 Rep.
Create tag synonyms
Badges
15 33
Impact
~68k people reached

Jul
30
comment Are the “proofs by contradiction” weaker than other proofs?
Related: math.stackexchange.com/questions/198.
Jul
30
answered Proof that $n^3+2n$ is divisible by 3
Jul
30
revised Proof that $n^3+2n$ is divisible by 3
added 357 characters in body
Jul
30
answered Proof that $n^3+2n$ is divisible by 3
Jul
28
answered How do I convert from Cartesian to conical coordinates?
Jul
27
awarded  Beta
Jul
27
comment Proof of Angle in a Semi-Circle is 90 degrees
Nice! Hadn't seen this proof before.
Jul
25
awarded  Mortarboard
Jul
25
comment Probability that two people see each other at the coffee shop
Tom Stephens: In Mathematica, you can generate the above plot by running RegionPlot[x - 1/3 < y < x + 1/3, {x, 0, 1}, {y, 0, 1}, FrameTicks -> {{0, 1/3, 2/3, 1}, {0, 1/3, 2/3, 1}}] then selecting Save Graphic As… from the right-click menu to make a PNG. If you don't have Mathematica, you'll need to find some other tool.
Jul
25
comment How can I randomly generate trees?
And now there's no http://, which you need to make it a link. (I had it in my comment but it was stripped out.)
Jul
25
comment Probability that two people see each other at the coffee shop
I don't know which classes you're taking where this is a common homework question, but I just really like the graphical solution for this problem and so I thought I'd ask it so that someone could put up the solution.
Jul
25
accepted Picking cakes if we need at least one of each type
Jul
25
comment Picking cakes if we need at least one of each type
I'd always heard this as a "ribbon cutting" problem, but that doesn't seem to be a standard term online. Looks to me like everyone teaches the including-zero variation first, but I find this one much more intuitive.
Jul
25
comment Picking cakes if we need at least one of each type
This is a variant on Casebash's question that can be solved by changing this problem slightly to fit into that problem's constraints and using that formula, but there's another solution that doesn't require changing the problem.
Jul
25
asked Picking cakes if we need at least one of each type
Jul
25
comment How can I randomly generate trees?
I think that link should just be www-cs-faculty.stanford.edu/~uno/fasc4a.ps. Somehow you got the Google tracking page in there when you copied the link.
Jul
25
answered Combinations of selecting n objects with k different types
Jul
25
comment Probability that two people see each other at the coffee shop
Nice. It's funny we both used Mathematica and then uploaded to imgur for the region plot.
Jul
25
awarded  Scholar
Jul
25
accepted Probability that two people see each other at the coffee shop