Just checking, I wasn't trying to call anyone dumb. I haven't read much of the Verlinde paper and so I didn't know if you meant binomial coefficient, or perhaps an order-preserving definition of a "choose" function. On Tue, Jul 20, 2010 at 11:08, Mike Stay <metaweta@gmail.com> wrote:
On Tue, Jul 20, 2010 at 12:05 AM, Robert Munafo <mrob27@gmail.com> wrote:
[...] In this case, the inner box has only one particle inside, so there are
10 choose 1 = 10 ways to choose a labeling of the inner box; the outer box has two particles inside, so there are 20 choose 2 = 380 ways. Thus there are 3800 ways to label the system in all.
I thought "20 choose 2" was 20*19/2 = 190. Likewise, 10 choose 2 would be 45. So, a ratio of 4.5, not a ratio of 9. What did I miss?
Nothing, of course. It was a dumb mistake. - Mike Stay - metaweta@gmail.com http://www.cs.auckland.ac.nz/~mike http://reperiendi.wordpress.com
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
-- Robert Munafo -- mrob.com