Removing the brackets around equation numbering

Question

I am using the equation environment with the amsmath package. I would like to remove the brackets on each side of the equation numbering.

I would like to have my equation labelled as 1, 2, 3 ... instead of (1), (2), (3).

Is there an appropriate command for this?

Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. — karlkoeller, Feb 16 '15 at 15:23
Possible duplicate: Changing align environment tag styles and colors — Werner, Feb 16 '15 at 15:30

karlkoeller · Answer 1 · 2015-02-16T17:27:26.240

16

If you are using amsmath, just redefine \tagform@ in this way

\makeatletter
\renewcommand\tagform@[1]{\maketag@@@{\ignorespaces#1\unskip\@@italiccorr}}
\makeatother

MWE

\documentclass{article}
\usepackage{amsmath}
\makeatletter
\renewcommand\tagform@[1]{\maketag@@@{\ignorespaces#1\unskip\@@italiccorr}}
\makeatother

\begin{document}
\begin{equation}
  x=y
\end{equation}
\end{document}

enter image description here

EDIT

As egreg notices, you might want \eqref to keep the parenthesis when printing the reference. In this case, replace the above code with

\makeatletter
\let\oldtagform@\tagform@
\renewcommand\tagform@[1]{\maketag@@@{\ignorespaces#1\unskip\@@italiccorr}}
\renewcommand{\eqref}[1]{\textup{\oldtagform@{\ref{#1}}}}
\makeatother

MWE:

\documentclass{article}
\usepackage{amsmath}
\makeatletter
\let\oldtagform@\tagform@
\renewcommand\tagform@[1]{\maketag@@@{\ignorespaces#1\unskip\@@italiccorr}}
\renewcommand{\eqref}[1]{\textup{\oldtagform@{\ref{#1}}}}
\makeatother

\begin{document}
\begin{equation}\label{myeq}
  x=y
\end{equation}
A reference to equation \eqref{myeq}
\end{document}

Output:

enter image description here

edited Feb 16 '15 at 17:27

answered Feb 16 '15 at 15:22

karlkoeller

124,410

Note that this will remove the parentheses also with \eqref, which may be wanted or not. – egreg Feb 16 '15 at 17:16
@egreg I presume that \eqref should have the same behavior as the tag. Anyway, I've added how to circumvent this. – karlkoeller Feb 16 '15 at 17:28
I wouldn't remove the parentheses to begin with. It was just a remark. – egreg Feb 16 '15 at 17:31
@JulienBernard You're welcome. Remember that you can accept the answer to mark the question as solved. See How do you accept an answer? – karlkoeller Feb 18 '15 at 06:24
1

I would like to do the opposite: remove the parentheses only when printing the reference, but not when labeling equations. – Leonardo Castro Dec 14 '18 at 01:28

score 1 · Answer 2 · answered Feb 16 '15 at 15:23

1

Put

\makeatletter
\def\@eqnnum{{\normalfont \normalcolor \theequation}}
\makeatother

in the preamble

\documentclass{article}

\makeatletter
\def\@eqnnum{{\normalfont \normalcolor \theequation}}
\makeatother

\begin{document}

\begin{equation}
    c^2 = a^2 + b^2
\end{equation}

\end{document}

enter image description here

answered Feb 16 '15 at 15:23

Maarten Dhondt

5,860

2

It's tagged amsmath... – karlkoeller Feb 16 '15 at 15:25

Removing the brackets around equation numbering

2 Answers2

EDIT

Linked