[Tex/LaTex] Enumeration on one line

#enumeratelists

I am trying to have three matrices on one line as

i) A=(..), ii) B=(..) and ii) C=(..).

I tried \nopagebreak, \noindent just after item. Instead I always get the Roman numeral on one line, a comma on the next line, etc.
Below is my code

\begin{document}
\begin{questions}
Determine which of the following matrices are Hermitian

\begin{enumerate}[i)]
\item \begin{displaymath} \noindent A= \begin{pmatrix*} 2 & 2+3i & 4-5i \\
2-3i & 5 & 6+2i \\
4+5i & 6-2i & -7 \\ \end{pmatrix*}
end{displaymath},
\item \begin{displaymath}B= \left [ \begin{array}{rrr}3 & 2-i & 4+i \\[2ex]
2-i & 6 & i \\ [2ex] 4+i & i & 3 \\
\end{array} \right] \end{displaymath},
\item \begin{displaymath}C= \left [ \begin{array}{rrr}4 & -3 & 5 \\[2ex]
-3 & 2 & 1 \\ [2ex] 5 & 1 & -6 \\
\end{array} \right] \end{displaymath}
\end{enumerate}
\end{questions}
\end{document}

Best Answer

You can use the enumitem package that also frees you from manually adding the separators. Note that this package is much more powerful than paralist and offers several more bells and whistles.

\documentclass{article}
\usepackage{mathtools}
\usepackage[inline]{enumitem}

\begin{document}

Determine which of the following matrices are Hermitian\\*[\medskipamount]
\begin{enumerate*}[label=\roman*),itemjoin={,\quad}]
\item $A= \begin{bmatrix*}[r] 
          2    & 2+3i & 4-5i \\
          2-3i & 5    & 6+2i \\
          4+5i & 6-2i &  -7 \\ 
          \end{bmatrix*}$

\item $B= \begin{bmatrix*}[r]
          3 & 2-i & 4+i \\
          2-i & 6 & i \\  
          4+i & i & 3 \\
          \end{bmatrix*}$

\item $C= \begin{bmatrix*}[r]
          4 & -3 & 5 \\
          -3 & 2 & 1 \\
          5 & 1 & -6 \\
          \end{bmatrix*}$
\end{enumerate*}

\bigskip\bigskip

Determine which of the following matrices are Hermitian\\*[\medskipamount]
\begin{enumerate*}[label=\roman*),itemjoin={,\quad}]
\item $A= \begin{bmatrix}
          2    & 2+3i & 4-5i \\
          2-3i & 5    & 6+2i \\
          4+5i & 6-2i &  -7 \\ 
          \end{bmatrix}$

\item $B= \begin{bmatrix}
          3 & 2-i & 4+i \\
          2-i & 6 & i \\  
          4+i & i & 3 \\
          \end{bmatrix}$

\item $C= \begin{bmatrix}
          4 & -3 & 5 \\
          -3 & 2 & 1 \\
          5 & 1 & -6 \\
          \end{bmatrix}$
\end{enumerate*}

\end{document}

As you see, the separation between the items is set with the itemjoin key.

I added the version with matrices having the default center alignment, which seems much better (except, perhaps, for the third one).

enter image description here

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