What is the way to change the way the align environment numbers the equations?
Say I want to change the (1) to a (I) or a (A)
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1That is not really something align does, but all the eqn giving envs. Is it only this particular one or do you want all eqn numbers like that? And BTW welcome– daleifCommented Sep 17, 2016 at 18:05
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1Related: How do I number equations with roman numbers?– Werner ♦Commented Sep 17, 2016 at 18:21
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Really I was just looking to change one particular one, but the answer given helped. And thanks btw.– D. BritoCommented Sep 17, 2016 at 22:22
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1 Answer
You can use the \newtagform and \usetagform from mathtools. Here are a few samples:
\documentclass[leqno]{article}
\usepackage[utf8]{inputenc}
\usepackage{fourier, erewhon}
\usepackage{mathtools}
\newtagform{Alph}[\renewcommand{\theequation}{\Alph{equation}}]()
\newtagform{roman}[\renewcommand{\theequation}{\roman{equation}}]()
\newtagform{scroman}[\renewcommand{\theequation}{\scshape\roman{equation}}][]
\begin{document}
\usetagform{Alph}
\begin{equation}
a = b + c
\end{equation}
\usetagform{roman}
\begin{equation}
d = e + f
\end{equation}
\usetagform{default}
\begin{equation}
x = y + z
\end{equation}
\usetagform{scroman}
\begin{equation}
u = v + w
\end{equation}
\end{document}
