# Multiple Commutative Diagrams

I need to make two commutative diagrams (I am using the CD environment) in the same line (I mean not one above the other) can anyone give me an idea?

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Just place them in the same equation(*) environment, perhaps separated by a space (\quad or \qquad):

\documentclass{article}

\usepackage{amsmath,amscd}

\begin{document}

\begin{equation*}
\begin{CD}
a @>>> b \\
@VVV @AAA \\
c @= d
\end{CD}