我有一个 Latex 文档,如下图所示:(我正在使用 AMS Math。)
我想\implies
在等式 e=1 之前加一个符号。但是,我不想任何其他变更发生。我知道使用 的简单方法align
,但问题是它们会将数学块的整体中心更改为如下内容(不需要):
我想要的是这样的:
我使用的代码是这样的:
\subsection{Definition}
A parabola is the set of points in a plane in such a way that their distance
from a fixed point of the plane and from a fixed line of the plane are equal.
\begin{align*}
&\mathrm{SP} = \mathrm{PM} \\
\implies & e = 1
\end{align*}
该怎么办?
答案1
使用\mathllap
以下命令mathtools
:
\documentclass{article}
\usepackage[showframe]{geometry}
\usepackage{mathtools}
\begin{document}
A parabola is the set of points in a plane in such a way that their distance
from a fixed point of the plane and from a fixed line of the plane are equal.
\begin{align*}
&\mathrm{SP} = \mathrm{PM} \\
\implies & e = 1
\end{align*}
\begin{align*}
&\mathrm{SP} = \mathrm{PM} \\
\mathllap{\implies} & e = 1
\end{align*}
\end{document}