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

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}
  • How to use the latex code "\left[ \right]" in the above code in order to get large 3rd bracket? – M. A. SARKAR Nov 16 '19 at 18:18
  • 1
    @M.A.SARKAR I have edit my answer with an addendum. – Sebastiano Nov 16 '19 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 '19 at 16:40
6

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

  • 2
    In your answer is missed \documentclas{...} ... – Zarko Nov 16 '19 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 '19 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 '19 at 10:31
  • @Teepeemm package is included in line 1 – bgleb Nov 18 '19 at 20:21

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.