Terje Røsand
E-post: terjero@idi.ntnu.no
Fin boks..........
Permutasjoner
#!latex (-)
\begin{equation}
P(n,r)=\frac{n!}{(n-r)!}
\end{equation}
Binomialkoeffisient
#!latex (-)
\begin{equation}
C(n,r)=\frac{n!}{r!(n-r)!} = {n\choose r}
\end{equation}
Stirlingtall
#!latex (-)
\begin{equation}
S(m,n)=\frac{1}{n!}\sum_{k=0}^{n}(-1)^k {n \choose n-k}(n-k)^m
\end{equation}