Chris Taylor
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 Jan31 comment Is this number rational or irrational? @HagenvonEitzen Thanks. This question was actually inspired by this topic on Hacker News. Jan31 comment Coin flipping probability game ; 7 flips vs 8 flips I would also be perfectly willing to accept the intuitive explanation as a proof. In fact, it's a strictly better proof than the one given, because it immediately generalizes to the case where your friend flips $n$ times and you flip $n+1$ times for $n\geq 0$. Jan31 comment Is this number rational or irrational? @Martín-BlasPérezPinilla How long did it take you to come up with this argument? Did you see it instantly? Jan31 asked Is this number rational or irrational? Jan28 comment Few calculus questions Hi. It looks like you are new here. We are generally very willing to help, but we like users to show the work that they've done towards solving the problem on their own first. If you can edit your question to show what you've done so far, and where you are stuck, then you will get a much better response. Jan23 reviewed Approve Derivative of sqrt( Vector * Matrix * Vector ) according to one coordonate of the vector Jan23 answered Derivative of sqrt( Vector * Matrix * Vector ) according to one coordonate of the vector Jan15 awarded Enlightened Jan15 awarded Nice Answer Jan15 comment Why isn't $\int\sin(ix)~dx$ equal to $i\cos(ix)+C$ ? @Lucian The law in the land of Mathematics is "unequal until proven equal" ;) Jan15 answered Why isn't $\int\sin(ix)~dx$ equal to $i\cos(ix)+C$ ? Jan14 comment Rational probabilities @Did Oh, I misunderstood! I Assumed you were giving a reason that my example couldn't be a measurable space, and somehow twisted your words to mean something they didn't. Jan14 comment Rational probabilities @Did Interesting - in what way does $2^\mathbb{N}$ fail to be a sigma algebra? Jan14 comment Rational probabilities Interesting. I had initially written "consider only countable sample spaces" but decided to remove it to make the question more general. Any reason not to use a measure taking values on $\mathbb{Q}$ if you have a countable sample space (the sigma algebra could still be uncountable, I think, eg if $\Omega=\mathbb{N}$ and $F=2^\mathbb{N}$) Jan14 asked Rational probabilities Jan10 awarded Good Answer Jan10 comment How to compute the output of floating numbers? No problem - it's good to have you here at Math Stack Exchange! Jan10 revised How to compute the output of floating numbers? added 16 characters in body Jan10 revised Explain cosmic distances to a child added 218 characters in body Jan10 revised Explain cosmic distances to a child added 218 characters in body