kuing 当前离线
为何latex中在等号右侧添加&符号会减小=与右侧字符之间间距? 以下公式的代码为: \begin{aligned} =&a=a \end{aligned} 知乎显示为: $\begin{aligned} =&a=a \end{aligned}$ 可见第一个=a间的间距远小于第二个
\begin{aligned} =&a=a \end{aligned}
$$ \begin{aligned} =&a=a \end{aligned} $$
$$ {=}{a=a} $$
$$ \begin{aligned} ={}&a=a \end{aligned} $$
$$ \begin{aligned} a&=a \end{aligned} $$
$$ {a}{=a} $$
$$ {a}{{}=a} $$
$-1$
${}-1$
$$ \begin{aligned} -1 \end{aligned} $$
$$ \begin{aligned} &-1 \end{aligned} $$
isee 当前离线
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