Example:
Let A = \{$\alpha$,$\beta$,$\psi$\} be a set operates on $\star$ then
\begin{table}
\centering
\begin{tabular}{l|lll}
\textbf{$\star$} & \textbf{$\alpha$} & \textbf{$\beta$} &\textbf{$\gamma$}\\
\hline
$\alpha$ & $\alpha$ & $\alpha$ & $\alpha$ \\
$\beta$ & $\beta$ & $\beta$ & $\beta$ \\
$\gamma$ & $\gamma$ & $\gamma$ & $\gamma$ \\
\end{tabular}
\end{table}
Further text.
I want to remove unnecessary extra spacing before and after the table.
\centeringwithouttableenvironment, use\begin{center} ... \end{center}orminipageinstead. – Tawei Nov 06 '13 at 08:18\begin{center} ... \end{center}also adds space, so that's not the way to go. – wasteofspace Nov 06 '13 at 09:39