latex大括号公式

在使用LaTeX编写大括号公式时，需要注意以下几点：
1. 在大括号公式中，&符号用于对齐等号，等号前后不应有空格。 $ } \\
$ x=Q(x)=q_{2} $ & \text{ $ x \in [C,maximum $ }
\end{cases}
\end{equation}

正确方式一：分段公式等号对齐
\begin{equation}
\left\{ \begin{aligned}
%\nonumber dx(t)&=[Ax(t-\delta) Bu(t) Cw(t)]dt DdW(t), t\in(0,T],\\
x(s)&=\xi(s), s\in [-\delta, 0].
\end{aligned} \right.
\end{equation}

正确方式二：有目标函数的分段公式对齐
\begin{align}
\nonumber &min_{u\in \mathcal{U}}J_1(u(\cdot), w(\cdot))\\
&s.t.\left\{ \begin{aligned}
%\nonumber dx(t)&=[Ax(t-\delta) Bu(t) Cw(t)]dt DdW(t), t\in(0,T],\\
x(s)&=\xi(s), s\in [-\delta, 0].
\end{aligned} \right.
\end{align}

请根据具体需求选择适合的方式进行编写。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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