Math & Science ⇒ Equation Number with additional Symbol

[symbol]

I have a formula in which there is the symbol \pm like this.

Code: Select all

\begin{equation}\label{boh}
  y = \pm x
\end{equation}

Now this equation is numbered with something like (x). How to get (x)^{\pm} instead of (x) in the equation number?

Thanks a lot!

[localghost]

[…] How to get (x)^{\pm} instead of (x) in the equation number? […]

Is this numbering scheme going to be globally throughout the whole document or locally for selected equations?


Best regards and welcome to the board
Thorsten

[symbol]

I would like to have that symbol only for selected equations.

[localghost]

Try this approach by the mathtools package.

Code: Select all

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

\newtagform{pm}{(}{)\rlap{$^\pm$}}

\begin{document}
  \usetagform{pm}
  \begin{equation}\label{eqn:einstein}
    E=mc^2
  \end{equation}
  \usetagform{default}

  \begin{equation}\label{eqn:schroedinger}
    i\hbar\frac{\partial}{\partial t} |\,\psi (t) \rangle = \hat{H} |\,\psi (t) \rangle
  \end{equation}
\end{document}

For other capabilities of the package refer to its manual.

[symbol]

Great ! It is exactly what I need.
Thank you so much !