amsart and enumerate environment

Question

I'm using the amsart documentclass. Now the equation numbers are aligned to the left, I'm okay with that but what bothers me is the following: If I have equations in an enumerate environment it centers the equations with respect to the whole page. To me that doesn't look very good. How do I center the equation with respect to the body of the enumerate environment?

@Jonas: Welcome to TeX.SX! Have a look at How to enumerate equations. There are solutions for itemize environments which may be used for enumerate environments as well. — Stefan Kottwitz, Mar 07 '11 at 15:54
@Jonas: Or do you still want the equations centered, but centered in the part of the text without the additional left margin? — Hendrik Vogt, Mar 07 '11 at 17:02
@Jonas: OK, that's what I thought. I've taken the liberty to try and clarify your question a bit. — Hendrik Vogt, Mar 07 '11 at 20:54
Does one of the solutions in “How can I center text/math inside a list environment?” work with amsart? — Caramdir, Mar 07 '11 at 23:37
@Jonas: Just to point that out: The page Caramdir linked to solves the opposite problem, but the methods could well work for your problem, too. — Hendrik Vogt, Mar 08 '11 at 07:44
Related: http://tex.stackexchange.com/questions/93952/left-numbered-equation-inside-list-environment/93978#93978 — kan, Oct 04 '13 at 16:44

score 2 · Accepted Answer · answered Mar 19 '11 at 18:03

As long as you don't want the equations to be numbered, you can use the following:

\documentclass{amsart}

%--------------------------------------------------------------------
\newenvironment{shiftequation}
{%
  \par\noindent\begin{minipage}{\linewidth}
  \begin{equation*}
}
{%
  \end{equation*}
  \end{minipage}
}
%--------------------------------------------------------------------
\begin{document}

Here's some text. Here's some text. Here's some text. Here's some
text. Here's some text. Here's some text. Here's some text. Here's
some text. Here's some text.
\begin{equation*}
  \sin^{2} x + \cos^{2} x =
  \int_{0}^{1} \bigl(\sin x + \cos x\bigr)^{4}\, dx +
  \int_{-1}^{1} \bigl(\log(x^{3}) + \sin^{5} (x^{5})\bigr)^{4}\,dx
\end{equation*}

\begin{enumerate}
\item Here's some text. Here's some text. Here's some text. Here's
  some text. Here's some text. Here's some text. Here's some
  text. Here's some text. Here's some text.
  \begin{shiftequation}
  \sin^{2} x + \cos^{2} x =
  \int_{0}^{1} \bigl(\sin x + \cos x\bigr)^{4}\, dx +
  \int_{-1}^{1} \bigl(\log(x^{3}) + \sin^{5} (x^{5})\bigr)^{4}\,dx
  \end{shiftequation}
\item Here's some text. Here's some text. Here's some text. Here's
  some text. Here's some text. Here's some text. Here's some
  text. Here's some text. Here's some text.
\end{enumerate}

\end{document}

Alas, if you try the same thing with a numbered display (i.e., changing equation* to equation), then the equation numbers line up with the left margin of the text inside the enumerate environment, rather than with the left edge of the overall text area.

amsart and enumerate environment

1 Answers1