I have expressions that I'd like to have aligned so that the first letters are aligned, but that the whole thing is still in center. I have this:
\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}
Which gives me this:
I'd like that the U and V are aligned in every row. Is it possible without renaming and redefining commands? Flushleft isn't helping, and centering doesn't do anything :\
