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**1327**on Tue Nov 05, 2013 7:11 pm

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## Curly Braces in Equation## LaTeX Forum: Math & Scienceequations • math-mode • mathematics •Add tags
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I am new with LaTeX. I don't understand why this code line is not working.
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`\begin{equation}` \label{eq:4.20} \eta_{elec}= \left{ \frac {\gamma_{j,in} - {\langle{\gamma_j}\rangle}_j} {\gamma_{j,in}-1} \right} \end{equation}
Please suggest me Last edited by cgnieder on Sun Apr 7th, 2013, edited 1 time in total.
- Amitavo Roy
**Posts:**14**Joined:**Sat Apr 6th, 2013
And please always provide a self-contained and minimal example to give an adequate problem description. Those who try to help are rarely motivated to write a complete example from scratch.
If you want curly braces in the output, you have to escape them by a backslash ( `\` ) and so make them a command. Curly braces are usually used for grouping so this measure is necessary to get them printed.The actual error is caused by the fact that `\left` and `\right` expect a delimiter (braces, brackets, parentheses). otherwise they will produce error.- Code: Select all • Open in online LaTeX editor
`\documentclass[11pt]{article}` \usepackage[T1]{fontenc} \usepackahe{mathtools} % loads »amsmath« \begin{document} \begin{equation}\label{eq:dummy} \eta_text{elec}=\left\{\frac{\gamma_{j,in} - \langle\gamma_j\rangle_j}{\gamma_{j,in}-1}\right\} \end{equation} \end{document}
For more clarity in your code you should avoid superfluous braces (see above). Basic reading: Further reading: - The »Math mode« document
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