\documentclass[12pt]{article}
\usepackage{amsmath,mathrsfs,bbm}
\usepackage{amssymb}
\textwidth=4.825in
\overfullrule=0pt
\thispagestyle{empty}

\begin{document}
\noindent
%
%
{\bf Joe DeMaio and Bindia Mathew}
%
%

\medskip
\noindent
%
%
{\bf Which Chessboards have a Closed Knight's Tour within the Rectangular Prism?}
%
%

\vskip 5mm
\noindent
%
%
%
%
A closed knight's tour of a chessboard uses legal moves of the knight to visit
every square exactly once and return to its starting position. In 1991 Schwenk
completely classified the $m\times n$ rectangular chessboards that admit a
closed knight's tour.  In honor of the upcoming twentieth anniversary of the
publication of Schwenk's paper, this article extends his result by classifying
the $i\times j\times k$ rectangular prisms that admit a closed knight's tour. 



\end{document}

.