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bio website www-apr.lip6.fr/~lumbroso
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visits member for 3 years, 5 months
seen Aug 13 at 6:21

Aug
7
comment Coupon collectors problems with multiple coupons in a cereal box
As per Ross Millikan, there are not enough details in the question. Furthermore, I don't understand how the parameter $m$ affects the problem, since it will not factor in the solution to your problem.
Aug
6
awarded  Citizen Patrol
Aug
6
comment Algorithm for intersection between polyline and rectangle?
I imagine if the array is sorted then it might be possible to do something that is logarithmic. A more natural place to ask this question is the CS.SE.
Aug
6
comment The expected payoff of a dice game
You beat me to it. Very good answer, because it allows for an easy generalization to $k$ dice rolls.
Aug
6
suggested suggested edit on Probability that the sum of randomly selected integers from a (random) set S is odd even?
Aug
6
awarded  Organizer
Aug
6
revised Probability that the sum of randomly selected integers from a (random) set S is odd even?
rephrased, retitled and added tags
Aug
6
suggested suggested edit on Probability that the sum of randomly selected integers from a (random) set S is odd even?
Aug
5
revised Probability that the sum of randomly selected integers from a (random) set S is odd even?
completed answer with illustration
Aug
5
revised Probability that the sum of randomly selected integers from a (random) set S is odd even?
completed answer with illustration
Aug
5
awarded  Critic
Aug
5
answered Probability that the sum of randomly selected integers from a (random) set S is odd even?
Jul
6
awarded  Teacher
Jul
5
comment Is it unlikely to get the same number of heads/tails?
@did: I said "discovered among others", so I think my formulation was correct---especially considering Wästlund mentions Keane and O'Brien in the very first page as being the prior publishers. I happen to prefer the former's presentation. Was it really necessary for you to correct me so tersely?
Jul
5
answered Is it unlikely to get the same number of heads/tails?
Jul
5
comment Is it unlikely to get the same number of heads/tails?
Good answer. Incidentally it is worth noting the connections: this is the probability that a random walk is a bridge (that is it begins and ends on the x-axis), and furthermore it is interesting to note that this fact is used to have an entirely discrete and exact simulation of a coin of bias $\sqrt{p}$ given a coin of bias $p$, discovered among others by Johan Wästlund and systematized in a recent wonderful paper by Flajolet et al..
May
8
comment Expected time to roll all 1 through 6 on a die
Follow-up question, Didier: what's the distribution? :)
Jul
10
awarded  Supporter
Jul
10
awarded  Editor
Jul
10
revised Closed-form Expression for $\sum_{j=0}^{k-1}(2j+2)\sum_{i=1}^j \frac 1 {i^2}$? (problem with Mathematica)
Added my solution and further discussion based on comments.