zero dimensionalZeroDimensional2004-10-04 14:21:022008-01-17 20:34:54Definition% this is the default PlanetMath preamble. as your knowledge
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\newcommand{\sR}[0]{\mathbb{R}}
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\newtheorem{thm}{Theorem}
\newtheorem{defn}{Definition}
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\newtheorem{lemma}{Lemma}
\newtheorem{cor}{Corollary}\begin{defn} \cite{steen, willard}
Suppose $X$ is a topological space. If $X$ has a basis consising of
clopen sets, then $X$ is said to be \PMlinkescapetext{\emph{zero dimensional}}.
\end{defn}
\begin{thebibliography}{9}
\bibitem{steen} L.A. Steen, J.A.Seebach, Jr.,
\emph{Counterexamples in topology},
Holt, Rinehart and Winston, Inc., 1970.
\bibitem{willard} S. Willard, \emph{General Topology},
Addison-Wesley, Publishing Company, 1970.
\end{thebibliography}