\begin{center} \pagenumbering{gobble}
% logos % \includegraphics[height=3cm]{lpic.png} \hfill \includegraphics[height=3cm]{rpic.png} \linebreak \bigskip
{\Huge\bf Certificado de participación} \vfill
{\Huge r params$name.i
} \
\Large
r params$affiliation.i
\
\vfill
ha participado en: r params$type.i
r params$event.i
\
\vfill
r params$freetext.i
\
\vfill
con el/la r params$comm.type.i
: \
\vfill
{\Huge\bf r params$title.i
} \
\vfill
r if(params$coauthor.i != "~"){ paste0("en colaboración con: ", params$coauthor.i, "\\\\")}
con fecha r params$date.i
. \
\vfill
% signature %
Firmado por:\
\vfill
\includegraphics[height=2cm]{spic.png} \
r params$signer.i
\
r params$signer.role.i
\
\end{center} \pagebreak
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