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<div align="center"><big><b><big>Welcome to the 2023
Spring talks of ODTU-Bilkent Algebraic
Geometry Seminars</big></b></big><b><br>
</b></div>
<div align="center"><i>since 2000</i><br>
</div>
<div align="center"><b><b>=================================================================</b></b><br>
<br>
This week the <a
href="http://www.bilkent.edu.tr/~sertoz/agseminar.htm"
target="_blank">ODTU-Bilkent Algebraic Geometry
Seminar</a> is <b>online</b><br>
<br>
<i><font color="#ff00ff">This talk will begin at <u><b>15:40</b></u><u> (GMT+3)</u></font></i><br>
<a
href="https://www.timeanddate.com/worldclock/fixedtime.html?msg=ODT%C3%9C-Bilkent+Algebraic+Geometry+Seminar&iso=20230310T1540&p1=19"
target="_blank">Please check your time
difference between Ankara and your city here</a><br>
<b>=================================================================</b></div>
<div align="center">
<div align="center"><img
src="cid:part1.R0o2RU01.kq3VEr34@bilkent.edu.tr"
alt="image.png" width="369" height="562"></div>
<div align="center"><b> </b><br>
</div>
<font size="2"><i>Alexandra Bryksa, Czech artist,
<br>
Heavenly Golden Light in the Gothic Barcelona,
watercolor<br>
</i></font></div>
<div align="center"><br>
<div align="left"><b><b><font color="#ff0000">Speaker:<font
color="#000000"> <a
href="https://sites.google.com/view/domenico-valloni"
target="_blank">Domenico Valloni</a><br>
</font></font></b></b><b><b><font
color="#ff0000">Affiliation: </font><i>Hannover</i></b></b><b><b><font
color="#ff0000"><br>
Title:<font color="#000000"> Rational
points on the Noether-Lefschetz locus of
K3 moduli spaces<br>
</font><br>
</font></b></b></div>
</div>
<div align="left"><b><b><font color="#ff0000">Abstract:</font></b></b><font
color="#ff0000"><font color="#000000"> </font></font><br>
<div align="justify"><font color="#ff0000"><font
color="#000000">Let L be an even hyperbolic
lattice and denote by F_L the moduli space
of L-polarized K3 surfaces. This
parametrizes K3 surfaces X together with a
primitive embedding of lattices L
--->NS(X) and, when L = < 2d >, one
recovers the classical moduli spaces of
2d-polarized K3 surfaces. In this talk, I
will introduce a simple criterion to decide
whether a given \bar{Q}-point of F_L has
generic Néron-Severi lattice (that is, NS(X)
\cong L). The criterion is of arithmetic
nature and only uses properties of covering
maps between Shimura varieties. <br>
</font></font></div>
</div>
<div align="left"><font color="#ff0000"><font
color="#000000"> <br>
</font></font></div>
<div align="left"><font color="#ff0000"><font
color="#000000"><b><font color="#ff0000">Date:<font
color="#000000"> 10 March 2023</font></font></b>,
<b>Friday</b></font></font><br>
</div>
<div align="left"><font color="#ff0000"><font
color="#000000"><b><font color="#ff0000">Time: </font>15:40 <i>(GMT+3)</i></b><br>
<b><font color="#ff0000">Place: </font></b><font
color="#ff0000"><font color="#000000"><b>Zoom</b></font></font></font></font></div>
<blockquote>
<p><font color="#ff0000"><font color="#000000"><font
color="#ff0000"><font color="#000000"><b><b
style="color:rgb(51,51,51);font-family:arial,verdana,sans-serif;font-size:14px">One
day before the seminar, an
announcement with the Zoom meeting
link will be sent to those who
registered with Sertöz.<br>
</b></b></font></font></font></font></p>
<p><font color="#ff0000"><font color="#000000"><font
color="#ff0000"><font color="#000000"><b><b
style="color:rgb(51,51,51);font-family:arial,verdana,sans-serif;font-size:14px">If
you have registered before for one
of the previous talks, there is no
need to register again; you will
automatically receive a link for
this talk too.<br>
</b></b></font></font></font></font></p>
<p><font color="#ff0000"><font color="#000000"><font
color="#ff0000"><font color="#000000"><b><b
style="color:rgb(51,51,51);font-family:arial,verdana,sans-serif;font-size:14px">If
you have not registered before,
please contact him at <a
href="mailto:sertoz@bilkent.edu.tr?subject=Zoom%20Seminar%20Address%20Request"
target="_blank">sertoz@bilkent.edu.tr</a>.</b></b></font></font></font></font></p>
</blockquote>
<div align="left"><br>
</div>
<div align="left">You are most cordially invited to
attend.</div>
<div align="left"><br>
</div>
<div align="left">Ali Sinan Sertöz</div>
<div align="left"><font size="1"><i>(PS: To
unsubscribe from this list please send me a
note.)</i></font> </div>
<hr> </div>
</div>
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<pre class="moz-signature" signature-switch-id="87a2cee9-d620-424a-a445-b75df10dcad1" cols="72">----------------------------------------------------------------------------
Ali Sinan Sertöz
Bilkent Üniversitesi, Matematik Bölümü, 06800 Ankara
Ofis Tel: (312) - 290 1490
Bölüm Sekreterliği: (312) - 266 4377
Fax: (312) - 290 1797
e-posta: <a class="moz-txt-link-abbreviated" href="mailto:sertoz@bilkent.edu.tr">sertoz@bilkent.edu.tr</a>
Anasayfa: sertoz.bilkent.edu.tr
----------------------------------------------------------------------------</pre>
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