# How to maintain large brackets in a split environment?

For example, I want to write

$$\begin{split} \left\{ &ax + b =\\ & cx + d \right\} \end{split}$$


Latex tells me I annot split the brackets like this, for there is a \left without a \right, and vice versa.

How to treat this issue?

• Jan 4, 2021 at 13:37

Instead of \left\{ you should use \bigl\{ (or \Bigl\{, \biggl\{ ...) and \bigl\{ (or \Bigr\{, \biggr\{ ...) instead of \right\} :
\documentclass[twocolumn]{article}
$$\begin{split} \bigl\{ &ax + b =\\ & cx + d \bigr\} \end{split}$$