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\begin{document}
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{\Large המחלקה למתמטיקה, בן-גוריון}

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{\Huge A night of mathematics and Jazz}\\[0.2\baselineskip]

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\textbf{All faculty and students are cordially invited.}

\paragraph*{Program}

\subparagraph*{18:00 Undergraduate math club}

\emph{Barak Weiss}, Tel Aviv University

\textbf{The illumination problem}

The following elementary problem in geometry is still open: given a polygon $P$ in the plane, say that points $x$ and $y$ in $P$ \emph{see each other} if there is a billiard path from $x$ to $y$. Is there a polygon in which infinitely many pairs of points do not see each other?

Such problems turn out to be easy to state but very difficult to solve. I will explain this and related questions in greater detail, and describe some recent progress which relies on well-known work of Eskin and Mirzakhani (part of the late Maryam Mirzakhani`s Field medal citation).

\subparagraph*{19:00 A \textbf{Jazz show} by \emph{Tsachik and the perverse sheaves}}

\href{http://www.ehudettun.com/}{Ehud Ettun} on bass

\href{https://harukayabuno.com/en}{Haruka Yabuno} on Piano

\emph{Tsachik Gelander} on drums


    \includepdf[pages=-]{Haruka-and-Ehud.jpg}



\vfill

\textbf{Time}: \emph{נוב 26, 18:00—22:00, 2017}

\bigskip

\textbf{Location}: \emph{Math -101}

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\bigskip

\textbf{Web}: \emph{http://www.math.tau.ac.il/\textasciitilde{}barakw/action/firstmeeting/index.html}


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