[texhax] \binom

P. R. Stanley prstanley at ntlworld.com
Sun Mar 1 22:47:53 CET 2009

An excellent answer! That's exactly the sort of info I'm after!

 > Hi
> > What does it do? What do you get when you compile $\binom{3}{4}$ in a
> > document? Thanks
> > Paul
>It sets a 3 above a 4 and encloses them both in a single pair of sufficiently
>tall parentheses. The 3 and the 4 are the same size as each other. You
>probably already know what it denotes, but just in case you don't, here's one
>way to describe it: $\binom{n}{r}$ denotes the coefficient of $x^r 
>y^{n-r}$ in
>the expansion of $(x + y)^n$.

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