Latex: Left alignment for an equation

Question

I have these two definitions:

\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}

\begin{flalign*}
&\boldsymbol{R*^\sigma} & \sigma_{superset}(F)&=\sigma_{superset}(F')&\
&\boldsymbol{R*_{weak}^\sigma} & \sigma_{superset}(F)&=\sigma_{superset}(F')\cap\mathcal{P}(A)&
\end{flalign*}

\end{document}

Compiled, it looks like this:

I want the equations to be aligned by "=" as they are; but also that they are not centered but quite next to the bold symbols. Like, also aligned left.

It should look like this (done with MS Paint): The wanted result

user_2777074 · Answer

If you don't mind that all equations will be left aligned, you could use the fleqn option of amsmath:

\documentclass[12pt]{article}

\usepackage[fleqn]{amsmath}
\setlength{\mathindent}{0pt}

\begin{document}

\noindent text

\begin{alignat*}{3}
&\boldsymbol{R*^\sigma} & \sigma_{superset}(F)&=\sigma_{superset}(F')\
&\boldsymbol{R*_{weak}^\sigma} \quad& \sigma_{superset}(F)&=\sigma_{superset}(F')\cap\mathcal{P}(A)
\end{alignat*}


\end{document}

If you like to keep other equations centred, you could also switch temporarily:

\documentclass[12pt]{article}

\usepackage{amsmath}

\begin{document}

$$
  a
$$

{
\makeatletter
\@fleqntrue
\makeatother
\begin{alignat*}{4}
&\boldsymbol{R*^\sigma} & \sigma_{superset}(F)&=\sigma_{superset}(F')\
&\boldsymbol{R*_{weak}^\sigma} \quad& \sigma_{superset}(F)&=\sigma_{superset}(F')\cap\mathcal{P}(A)
\end{alignat*}
}


$$
  a
$$

\end{document}

Latex: Left alignment for an equation

1 Answers