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%%%%%%%% Champs titre %%%%%%%
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\subsection*{Burling Graphs}
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\addcontentsline{toc}{section}{Burling Graphs Revisited}
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\index{Pournajafi, P.}\index{Trotignon, N.}
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Nicolas Trotignon, LIP, ENS Lyon, {\tt nicolas.trotignon@ens-lyon.fr}\\
\indent
\underline{Pegah Pournajafi}, LIP, ENS Lyon, {\tt pegah.pournajafi@ens-lyon.fr}\\ %souligner l'orateur
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The class of Burling graphs is a triangle-free class of graphs with unbounded chromatic number. This class is interesting from different aspects. For example, they provide some results on $\chi$-boundedness problems. Also, they arise as interesting examples of intersection graphs of geometric objects. In this talk, we investigate some of the results about this class of graphs, mostly from \cite{ref1}, \cite{ref2}, and a work in preparation.


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\begin{figure}[htb]
\begin{center}
\includegraphics[height=4cm]{BurlingGraphs.jpg}
\caption{The first three graphs in the Burling sequence
\label{fig:graphe}}
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\end{figure}
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\begin{thebibliography}{99}

\bibitem{ref1}
Pournajafi, Pegah, and Nicolas Trotignon. "Burling graphs revisited--Part 1 New characterizations." arXiv preprint arXiv:2104.07001 (2021).

\bibitem{ref2}
Pournajafi, Pegah, and Nicolas Trotignon. "Burling graphs revisited Part 2: Structure." arXiv preprint arXiv:2106.16089 (2021).


\end{thebibliography}


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