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Feb
5
awarded  Popular Question
Feb
1
revised Why is this coin-flipping probability problem unsolved?
fixed probability
Feb
1
answered Why is this coin-flipping probability problem unsolved?
Feb
1
comment Why is this coin-flipping probability problem unsolved?
What if you know in advance the coin will come up heads p% of the time, even for p!=50? That's sort of the question I asked at: quant.stackexchange.com/questions/2172/… (and no answers there yet either)
Dec
18
awarded  Critic
Dec
10
comment Best fit circle to “planetary” elliptical orbit?
@hardmath I'd be interested in seeing a solution like that, but the idea of using a circle is to make the math easy. If the nonuniform motion were ugly enough, it would defeat the purpose. However, I'll upvote (but not approve) an answer like that, just to see what it looks like.
Dec
10
comment Best fit circle to “planetary” elliptical orbit?
@RahulNarain OK, I'm willing to do that (ie, accept an answer that minimizes d^2, not d). It seems traditional to minimize the distance squared, even though it's different from minimizing the distance itself.
Dec
10
awarded  Custodian
Dec
10
reviewed Approve Best fit circle to “planetary” elliptical orbit?
Dec
10
asked Best fit circle to “planetary” elliptical orbit?
Dec
1
comment Can an algorithm be part of a proof?
The proof of the Four-Color Theorem is probably the most famous example of proof-by-algorithm.
Nov
30
revised Show equation has at most two solutions on (0,2*Pi)
added 21 characters in body
Nov
30
comment Show equation has at most two solutions on (0,2*Pi)
Thanks, edited. I want this for ANY function dec[ha] (that satisfies the given conditions).
Nov
30
asked Show equation has at most two solutions on (0,2*Pi)
Nov
15
asked Determine angle from radius of curvature
Nov
13
comment Stumped by Common Core math problem
I still don't see how this is a rotation. Around which point do we rotate WXY to get CBA?
Nov
13
comment Stumped by Common Core math problem
Thanks! @JoelReyesNoche I think your answer was equivalent, but this answer is more detailed, and I understood it better, so giving the checkmark here.
Nov
13
accepted Stumped by Common Core math problem
Nov
13
comment Stumped by Common Core math problem
Unfortunately, I don't have the answer (I'm actually posting on behalf of someone else).
Nov
13
asked Stumped by Common Core math problem