在 widetext 中对齐方程式

Question

我想要对齐表达式，以便首字母对齐，但整个表达式仍位于中心。我有这个：

\documentclass[twocolumn,prc,floats,amsmath,amssymb]{revtex4}

\usepackage[croatian]{babel}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
\usepackage{mathtools}
\usepackage{bbm}
\usepackage{mathrsfs}
\usepackage[paperwidth=210mm,paperheight=297mm,centering,hmargin=1.5cm,vmargin=2.5cm]{geometry}


\begin{document}

Random textRandom textRandom textRandom textRandom textRandom 
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\begin{widetext}
\begin{equation}
\left.
\begin{aligned}
U &= -\pi/2 \\
V &=\pi/2
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
u &\to -\infty \\
v &\to \infty
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
r &\to \infty \\
t &\ \textrm{konačan}
\end{aligned}
\right\}
\begin{aligned}
&\textrm{prostorna} \\
&\infty,\ i_0
\end{aligned}
\end{equation}

\begin{equation}
\left.
\begin{aligned}
U &= \pm\pi/2 \\
V &=\pm\pi/2
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
u &\to \pm\infty \\
v &\to \pm\infty
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
r &\ \textrm{konačan} \\
t &\to \pm\infty
\end{aligned}
\right\}
\begin{aligned}
&\textrm{prošla i buduća} \\
&\textrm{vremenska}\ \infty,\ i_\pm
\end{aligned}
\end{equation}
\end{widetext}



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\end{document}

这给了我这个：

我希望 U 和 V 在每一行都对齐。不重命名和重新定义命令可以实现吗？Flushleft 没有帮助，居中也不起作用：

Answer 1

只需使用align而不是两个equation

\documentclass[twocolumn,prc,floats,amsmath,amssymb]{revtex4}

\usepackage[croatian]{babel}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
\usepackage{mathtools}
\usepackage{bbm}
\usepackage{mathrsfs}
\usepackage[paperwidth=210mm,paperheight=297mm,centering,hmargin=1.5cm,vmargin=2.5cm]{geometry}


\begin{document}

Random textRandom textRandom textRandom textRandom textRandom 
Random textRandom textRandom textRandom textRandom text
Random textRandom textRandom textRandom textRandom textRandom text

\begin{widetext}
\begin{align}
&\left.
\begin{aligned}
U &= -\pi/2 \\
V &=\pi/2
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
u &\to -\infty \\
v &\to \infty
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
r &\to \infty \\
t &\ \textrm{konačan}
\end{aligned}
\right\}
\begin{aligned}
&\textrm{prostorna} \\
&\infty,\ i_0
\end{aligned}
\\
&\left.
\begin{aligned}
U &= \pm\pi/2 \\
V &=\pm\pi/2
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
u &\to \pm\infty \\
v &\to \pm\infty
\end{aligned}
\right\}\Rightarrow
\left\{
\begin{aligned}
r &\ \textrm{konačan} \\
t &\to \pm\infty
\end{aligned}
\right\}
\begin{aligned}
&\textrm{prošla i buduća} \\
&\textrm{vremenska}\ \infty,\ i_\pm
\end{aligned}
\end{align}
\end{widetext}



Random textRandom textRandom textRandom textRandom textRandom text
Random textRandom textRandom textRandom text
Random textRandom text


\end{document}