[texhax] Please Help with Tables

[Robert Sherry]

Please consider the following LaTeX file:

\documentclass[a4paper,11pt]{article}
\usepackage{pst-node}
\usepackage{amsmath}
\usepackage{latexsym}
\title {Notes On Lattices}
\author{Robert~Sherry}
\begin{document}
\maketitle
\flushleft
Here are two table that define
$\sqcup$ and $\sqcap$.
\newline
\begin{tabular}{r|rrrr}
$\sqcup$ & x & y & $\bot$ & $\top$ \\
\hline
$\bot$ & $\bot$ & $\bot$ & $\bot$ & $\top$ \\
$\bot$ & $\bot$ & $\bot$ & $\bot$ & $\top$ \\
$\bot$ & $\bot$ & $\bot$ & $\bot$ & $\top$ \\
$\top$ & $\top$ & $\top$ & $\top$ & $\top$ \\
\end{tabular}
\vspace{2cm}
\begin{tabular}{r|rrrr}
$\sqcap$ & x & y & $\bot$ & $\top$ \\
\hline
$\bot$ & $\bot$ & $\bot$ & $\bot$ & $\bot$ \\
$\bot$ & $\bot$ & $\bot$ & $\bot$ & $\bot$ \\
$\bot$ & $\bot$ & $\bot$ & $\bot$ & $\bot$ \\
$\bot$ & $\bot$ & $\bot$ & $\bot$ & $\top$ \\
\end{tabular}
\newline
\end{document}

This file produces two tables side by side with the left table flush with
the
margin. Also there is very little space between the two tables. I would like
to see the left table indented some, and more space between the two tables.
I have tried \hspace but that did not help.

                          Robert Sherry