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<A NAME=CHANGEVR> <TITLE>CHANGEVR</TITLE></A> <b><a href=r37_idx.html>INDEX</a></b><p><p> <B>CHANGEVR</B> _ _ _ _ _ _ _ _ _ _ _ _ <B>package</B><P> <P> Author: G. Ucoluk <P> <P> This package provides facilities for changing the independent variables in a differential equation. It is basically the application of the chain rule. <P> <P>