# Write an equation in one-column in a two-column article using 'svjour3' package of Springer Journal

I am preparing an article for a Springer journal for the first time. I have quite long seen equation to put it in the paper. How can I write it in one column in the two-column article using 'svjour3' package of Springer Journal. Similarly, how can I add 'nomenclature' in the same article.

For the LaTex file see below:

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%
\RequirePackage{fix-cm}
%

\documentclass[twocolumn]{svjour3}

\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{lipsum}
\journalname{Springer Journal}
\begin{document}
%%%%%%%% Title%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\title{Title of the Article}
%%%%%%%%%%%%%%%%%%%%% Authors %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\author{Author's Name}
\institute{Author's Institute Name\\
\email{abcxyz@gmail.com}}
\date{}
\maketitle
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{abstract}
This is an abstract.
\end{abstract}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\keywords{Keyword1 \and Keyword2\and Keyword3}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\lipsum[1]
The functions $F_1$, $F_2$ and $F_3$  are given below
$$F(x_{1}, y_{1}, z_{1})=\frac{l x_{0}(1+b+c\sigma)}{\omega(1+b)} P(x_{1}, y_{1}, z_{1})+l\frac{\omega^{2}+b(1+b+c\sigma)}{x_{0}\omega(1+b)^{2}}Q(x_{1},y_{1},z_{1})+\frac{l x_{0}}{\sigma} R(x_{1}, y_{1}, z_{1})$$
\lipsum[2-4]

\end{document}


I don't see a way to break out of the two-column layout. Instead, I suggest to use the multline environment from the amsmath package. The example below uses a bit of \hspace and \hfill to tweak the horizontal alignment of the ensuing multiple rows.

\RequirePackage{fix-cm}
\documentclass[twocolumn]{svjour3}

\usepackage{calc}

\newlength{\firsttermlength}
\providecommand{\firstterm}{}
\newcommand{\ftspace}{\hspace{\firsttermlength}}

\newcommand{\setfirstterm}[1]{%
\renewcommand{\firstterm}{\ensuremath{#1}}%
\setlength{\firsttermlength}{\widthof{\firstterm}}}

\usepackage{amsmath}
\usepackage{lipsum}
\journalname{Springer Journal}

\begin{document}
\title{Title of the Article}

\author{Author's Name}
\institute{Author's Institute Name\\
\email{abcxyz@gmail.com}}
\date{}
\maketitle

\begin{abstract}
This is an abstract.
\end{abstract}
\keywords{Keyword1 \and Keyword2\and Keyword3}

\lipsum[1]
The functions $F_1$, $F_2$ and $F_3$  are given below
%
% we declare the first term ahead of the multline environment, so that
% its width becomes available for aligning the second and third row.
% the term itself is available in \firstterm, so that it does not need
% to be repeated.
%
\setfirstterm{F(x_{1}, y_{1}, z_{1})}
%
\begin{multline}
\firstterm\:=\:\frac{l x_{0}(1+b+c\sigma)}{\omega(1+b)} P(x_{1}, y_{1}, z_{1}) \\[1em]
\ftspace\: +\:l\frac{\omega^{2}+b(1+b+c\sigma)}{x_{0}\omega(1+b)^{2}}Q(x_{1},y_{1},z_{1}) \\[1em]
\ftspace\: +\:\frac{l x_{0}}{\sigma} R(x_{1}, y_{1}, z_{1}) \hfill
\end{multline}
\lipsum[2-4]

\end{document}