

\subsection{\bf Derivative Calculation for}
\subsection{\bf Maximum Likelihood---III}

\begin{slide}
\begin{itemize}
\item As far as your computer program is concerned, one can handle
$\chi^2$ and likelihood with same program.  

\item They just differ in calculational complexity $N$.  

\begin{description}
\item{$\bullet$} In $\chi^2$, $N$ is the number of ``bins.'' 
\item{$\bullet$} In likelihood, $N$ is number of events.
\end{description}

\item My old fitting programs

\begin{description}
\item{$\bullet$} Manxcat---Marquardt's Method
\item{$\bullet$} ``Feefoefum's Well Nigh Perfect Fit'' using
eigenvalue method
\item{$\bullet$} see later for methods
\end{description}

\item were designed to interface with either $\chi^2$ or maximum
likelihood.
\end{itemize}
\end{slide}

