<div dir="ltr"><p class="" style="text-align:center"><span style="font-size:18pt;font-family:'Times New Roman',serif">SEMINARIO
DI MATEMATICA</span><span style="font-family:'Times New Roman',serif;font-size:16pt"> </span></p>

<p class="MsoNormal" align="center" style="margin-left:9pt;text-align:center;line-height:18pt"><span style="font-size:16pt;font-family:'Times New Roman',serif">Martedì 1 marzo 2016</span><span style="font-size:16pt;font-family:'Times New Roman',serif"></span></p>

<p class="MsoNormal" align="center" style="margin-left:9pt;text-align:center;line-height:18pt"><span style="font-size:16pt;font-family:'Times New Roman',serif">ore 16:00</span></p>

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<p class="MsoNormal" align="center" style="margin-left:9pt;text-align:center;line-height:18pt"><u><span style="font-size:16pt;font-family:'Times New Roman',serif">Scuola Normale Superiore</span></u></p>

<p class="MsoNormal" align="center" style="margin-left:9pt;text-align:center;line-height:18pt"><span style="font-size:16pt;font-family:'Times New Roman',serif">Pisa</span></p>

<p class="MsoNormal" align="center" style="margin-left:9pt;text-align:center;line-height:18pt"><span style="font-size:16pt;font-family:'Times New Roman',serif;background-image:initial;background-repeat:initial">Aula Bianchi</span></p>

<p class="MsoNormal"><b><u><span style="font-size:16pt;font-family:'Times New Roman',serif"><span style="text-decoration:none"> </span></span></u></b></p>

<p class="MsoNormal" align="center" style="text-align:center;background-image:initial;background-repeat:initial"><b><span style="font-size:22pt;font-family:'Times New Roman',serif;background-image:initial;background-repeat:initial">Fabrizio Catanese</span></b><b><span style="font-size:22pt;font-family:'Times New Roman',serif"></span></b></p>

<p class="MsoNormal" align="center" style="text-align:center;background-image:initial;background-repeat:initial"><font face="arial, helvetica, sans-serif"><span style="font-size:9.5pt">(</span><i>Università di Bayreuth, Germany)</i><span style="font-size:9.5pt"></span></font></p>

<pre style="text-align:center"><b><i><span style="font-size:12pt;background-image:initial;background-repeat:initial"><font face="arial, helvetica, sans-serif"> </font></span></i></b></pre>

<p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:16pt;font-family:'Times New Roman',serif">terrà un
seminario dal titolo:</span></p>

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<p class="MsoNormal" align="center" style="text-align:center;background-image:initial;background-repeat:initial"><b><span lang="EN-US" style="font-size:22pt;font-family:'Times New Roman',serif;color:black">“</span></b><b><span lang="EN-US" style="font-size:22pt;font-family:'Times New Roman',serif;background-image:initial;background-repeat:initial">Configurations of lines and interesting algebraic
surfaces</span></b><b><span lang="EN-US" style="font-size:22pt;font-family:'Times New Roman',serif;color:black">”</span></b></p>

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<p class="MsoNormal" style="text-align:justify"><b><span lang="EN-US" style="font-family:'Times New Roman',serif">Abstract:</span></b></p>

<p class="MsoNormal" style="text-align:justify"><font face="arial, helvetica, sans-serif"><i><span lang="EN-US" style="background-image:initial;background-repeat:initial">Many important question
in the theory of surfaces and in algebraic geometry have been solved thanks </span></i><i><span lang="EN-US"><span style="background-image:initial;background-repeat:initial"><span style="text-align:start">to
explicit constructions of algebraic surfaces as abelian coverings branched over
special configurations of lines.</span></span> <span style="background-image:initial;background-repeat:initial">After
recalling  the classical configurations (Pappus, Desargues, Fano, Hesse) I
shall describe </span></span><span style="background-image:initial;background-repeat:initial"><span style="text-align:start">simple 
equations for such surfaces,</span></span> <span style="background-image:initial;background-repeat:initial">as 
the Fermat, and Hirzebruch-Kummer coverings.</span> <span style="background-image:initial;background-repeat:initial">As the configuration of lines becomes special some
interesting geometry shows up, as in the case</span> <span style="background-image:initial;background-repeat:initial">of the six lines of a complete quadrangle, relted to
the Del Pezzo surface of degree 5 and its icosahedral symmetry.</span> <span style="background-image:initial;background-repeat:initial">After mentioning many important such  examples
and applications, by several authors,</span> I shall concentrate on
a  recent simple series of such surfaces, studied in my joint work 
with <span style="background-image:initial;background-repeat:initial">Ingrid Bauer and Michael
Dettweiler, discussing  new results and quite general open questions.</span></i></font></p>

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<p class="MsoNormal" style="text-align:justify"><span lang="EN-US" style="font-size:9.5pt;font-family:Arial,sans-serif;background-image:initial;background-repeat:initial"> </span></p>

<p class="MsoNormal" style="text-align:justify"><span style="font-size:16pt;font-family:'Times New Roman',serif">Tutti gli interessati sono invitati a partecipare.</span></p>

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<p class="MsoNormal" style="text-align:justify"><span style="font-size:16pt;font-family:'Times New Roman',serif">Classe di Scienze Matematiche e Naturali</span></p>

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<p class="MsoNormal" style="text-align:justify"><span style="font-size:16pt;font-family:'Times New Roman',serif"> </span></p><div><div class="gmail_signature"><div dir="ltr"><div>Valeria Giuliani</div><div>Scuola Normale Superiore</div><div>Servizio alla Didattica e Allievi</div><div>tel. 050 509260</div><div>Piazza dei Cavalieri, 7</div><div>56126 Pisa</div><div>E-mail: <a href="mailto:valeria.giuliani@sns.it" target="_blank">valeria.giuliani@sns.it</a></div><div>E-mail: <a href="mailto:classi@sns.it" target="_blank">classi@sns.it</a></div></div></div></div>
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