\begin
Opdag hvorfor 18 millioner mennesker verden rundt stoler på Overleaf med deres arbejde.
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\documentclass[openacc]{rsproca_new}%%%%where rsproca is the template name
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\usepackage{lipsum}
\usepackage{multicol}
\addbibresource{refs.bib}
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\newtheorem{theorem}{\bf Theorem}[section]
\newtheorem{condition}{\bf Condition}[section]
\newtheorem{corollary}{\bf Corollary}[section]
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\jname{rsif}
\Journal{J R Soc Interface\ }
\begin{document}
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\title{Add your title here}
\author{%%%% Author details
Author 1$^{1}$, Author 2$^{2,1}$, Author 3$^{1}$, Author 4$^{1}$}
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\address{$^{1}$Address 1\\
$^{2}$Address 2}
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\maketitle
\begin{multicols}{2}
\section{Introduction}
\lipsum[1]
\lipsum[1]\cite{McKendrick}
\lipsum[1]\cite{Filipe2003, Brauer2008, Cross2005}
\section{Methods}
\begin{theorem}\label{T0.1}
Assume that $\alpha>0, \gamma>1, \beta>\frac{\gamma+1}{\gamma-1}$.
Then there exists a small $\tau_1>0$, such that for $\tau\in
[0,\tau_1)$, if $c$ crosses $c(\tau)$ from the direction of
to a small amplitude periodic traveling wave solution of
(2.1), and the period of $(\check{u}^p(s),\check{w}^p(s))$ is
\[
\check{T}(c)=c\cdot \left[\frac{2\pi}{\omega(\tau)}+O(c-c(\tau))\right].
\]
\end{theorem}
\begin{condition}\label{C2.2}
From (0.8) and (2.10), it holds
$\frac{d\omega}{d\tau}<0,\frac{dc}{d\tau}<0$ for $\tau\in
[0,\tau_1)$. This fact yields that the system (2.1) with delay
$\tau>0$ has the periodic traveling waves for smaller wave speed $c$
than that the system (2.1) with $\tau=0$ does. That is, the
delay perturbation stimulates an early occurrence of the traveling waves.
\end{condition}
\section{Results}
\lipsum[1]
\begin{equation}
H=\int\frac{1}{2}mv
\end{equation}
\lipsum[1]
\section{Conclusions}
\lipsum[1]
\appendix
\section{Appendix 1}
\lipsum[1-3]
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