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\usepackage{amsmath}
\usepackage{hyperref}
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\newenvironment{talk}[5]% [1] title,
                        % [2] speaker's name,
                        % [3] affiliation,
                        % [4] email,
                        % [5] coauthors
 {\vskip 0pt\nopagebreak%
 \noindent Joint 22nd Numerical Methods for Problems with Layer Phenomena / INAF Workshop \\
           Berlin, 7-9 May 2026, FernUniversit\"at in Hagen \\
 \rule{\textwidth}{0.5pt}%
 \vskip 6pt\nopagebreak%
  \noindent\textbf{#1}\vspace{3mm}\\\nopagebreak%
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\begin{document}

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\begin{talk}
  {Resolving singularities in parabolic initial-boundary value problems}%
  {firstname surname}%
  {XYZ-University}% affiliations go here 
  {email@xyz-university.com}% [4] email
  {firstname1 surname1, ... and firstnamen surnamen}% [5] coauthors

We consider ...

\textbf{References} if any

\end{talk}

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\end{document}  
