2

How to break an equation with a single summation symbol common ? I want to write the equation like the following in two line

$\sum  [(a+b+c+.........+d)

    +(e+f+............+l]=0$

3 Answers 3

3

To break a formula into several columns, with a single “summation symbol” common, you could use (also) the enviroment split. See this MWE and you can also compare it with other answers. If you want increase the brackets ( or [, considering that they are on two different lines, you should use (for example) \bigl( or \bigr) to not have any errors.

enter image description here

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath,amssymb}

\begin{document}
\begin{equation}
\begin{split}
&\sum[(a+b+c+\dotsb+d)\\
& +(e+f+\dotsb+l)]=0
\end{split}
\end{equation}
\end{document}

ADDEDUM after the comment of the user @M. A. SARKAR

As by your request I add you other alternatives where I increased the size of the square brackets with the appropriate commands. I hope I have understood your request.

enter image description here

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath,amssymb}

\begin{document}
\begin{equation}
\begin{split}
&\sum\bigl[(a+b+c+\dotsb+d)\\
& +(e+f+\dotsb+l)\bigr]=0
\end{split}
\end{equation}

\begin{equation}
\begin{split}
&\sum\Bigl[(a+b+c+\dotsb+d)\\
& +(e+f+\dotsb+l)\Bigr]=0
\end{split}
\end{equation}

\begin{equation}
\begin{split}
&\sum\Biggl[(a+b+c+\dotsb+d)\\
& +(e+f+\dotsb+l)\Biggr]=0
\end{split}
\end{equation}


\end{document}
3
  • How to use the latex code "\left[ \right]" in the above code in order to get large 3rd bracket?
    – learner
    Nov 16, 2019 at 18:18
  • 1
    @M.A.SARKAR I have edit my answer with an addendum.
    – Sebastiano
    Nov 16, 2019 at 23:06
  • @M.A.SARKAR No, no, please. Can you give to the user bgleb the check green mark please? This is check is not mine. Just for justice.
    – Sebastiano
    Nov 17, 2019 at 16:40
5

An alternative

\documentclass[twocolumn]{article}
\usepackage{mathtools}

\begin{document}
\[
    \begin{multlined}[0.7\linewidth]
\sum \bigl[(a+b+c+d) \\
        + (e+f+g+h+i+j+k+l)\bigr] = 0
    \end{multlined}
\]
\end{document}

enter image description here

2
\usepackage{amsmath}
\begin{document}   

\begin{align*}
    &\sum (a+b+c+d \\ 
    &+e+f+g+h+i+j+k+l)
\end{align*}

\end{document}

enter image description here

4
  • 2
    In your answer is missed \documentclas{...} ...
    – Zarko
    Nov 16, 2019 at 9:52
  • 2
    I would replace &\sum (a+b+c+d by \sum (&a+b+c+d and probably move also the + before the e directly after the d.
    – albert
    Nov 16, 2019 at 10:03
  • 1
    @Zarko This example will work with any \documentclass parameter, so there is not much point including that in the example. I have included the \begin{document} in order to show that it goes in the preamble.
    – bgleb
    Nov 16, 2019 at 10:31
  • @Teepeemm package is included in line 1
    – bgleb
    Nov 18, 2019 at 20:21

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .