4

i want to use a big bracket (\left( , \right)) in an align-enviroment over two lines, so that

\begin{align}
0=\left(a+b+c \\
  +d+e\right)
\end{align}

which is not possible, because Latex want me to close the bracket in the same line. Anyone an idea?

Greetings Michael

Michael
  • 43

2 Answers2

3

You close the first line with \right. and open the second with \left.. That said, it makes no sense to number each line, so you have to use an aligned environment within an equation, say, environment. What do you align, by the way?

    \documentclass[10pt]{article}
    \usepackage[utf8]{inputenc}
    \usepackage{lmodern}
    \usepackage{mathtools} 

    \begin{document}

    \begin{equation}\label{myeq}
            \begin{aligned}
    0=\left(a+b+c\right.  \\
     \left.  +d+e\right)
    \end{aligned}
    \end{equation}

    \end{document}

enter image description here

Bernard
  • 271,350
0

Although you can close these off using \left. and \right. in cases like this I use one of \big, \Big, \bigg, \Bigg. For these you need to use amsmath.

enter image description here

These work with all delimiters and there are "proper" left and right variants: \bigl, \Bigl, \biggl, \Biggl, \bigr, \Bigr, \biggr,\Biggr`. Rightly or wrongly, I tend use the ambidextrous ones.

In your example, I'd write:

\documentclass{article}
\usepackage{amsmath}
\begin{document}

\begin{align}
0=\big(a+b+c \\ +d+e\big)
\end{align}

\end{document}

which produces

enter image description here

No doubt your real example is not quite this simple, but you can pick the appropriate size of these macros to suit your tastes.