E="lbAD">&nbsp;</A>
<H2>DESCRIPTION</H2>

<P>
<DD>The purpose of <B>lmdif_</B> is to minimize the sum of the squares of
<I>m</I> nonlinear functions in <I>n</I> variables by a modification of
the Levenberg-Marquardt algorithm. The user must provide a subroutine
which calculates the functions. The Jacobian is then calculated by a
forward-difference approximation.
<P>
<B>lmdif1_</B> serves the same purpose but has a simplified calling
sequence.
<BR>

<A NAME="lbAE">&nbsp;</A>
<H3>Language notes</H3>

These fu