\magnification=1200
\hsize=4in
\overfullrule=0pt
\input amssym
\nopagenumbers
\noindent
%
%
{\bf Sen-Peng Eu and Tung-Shan Fu}
%
%
\medskip
\noindent
%
%
{\bf A Simple Proof of the Aztec Diamond Theorem}
%
%
\vskip 5mm
\noindent
%
%
%
%
Based on a bijection between domino tilings of an Aztec diamond and
non-intersecting lattice paths, a simple proof of the Aztec diamond
theorem is given by means of Hankel determinants of the large and
small Schr\"oder numbers.

\bye

.
