\magnification=1200
\hsize=4in
\overfullrule=0pt
\input amssym
\nopagenumbers
\noindent
%
%
{\bf David G. Wagner}
%
%
\medskip
\noindent
%
%
{\bf Rank--Three Matroids are Rayleigh}
%
%
\vskip 5mm
\noindent
%
%
%
%
A Rayleigh matroid is one which satisfies a set of inequalities
analogous to the Rayleigh monotonicity property of linear
resistive electrical networks.  We show that every matroid of
rank three satisfies these inequalities.

\bye

.