Text Formatting ⇒ enumeration of condtions

[rayman]

Hello! How do I do to get those conditions (i) and (ii) together with the enumeration?

[localghost]

At the moment I only see a manual solution.

Code: Select all

\documentclass[11pt,a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{mathtools}   % loads »amsmath«

\begin{document}
  \begin{subequations}
    \begin{alignat}{3}
      (i)\quad && \sigma(e,p) &= p &&\quad\forall p\in M \\
      (ii)\quad && \sigma(g_1,\sigma(g_2,p)) &= \sigma(g_1g_2,p) &&
    \end{alignat}
  \end{subequations}
\end{document}

Thorsten