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<div align="center"><big><b><big>Welcome to the 2025
Fall talks of ODTÜ-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">ODTÜ-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=20251114T1540&p1=19&ah=1"
target="_blank">Please check your time difference
between Ankara and your city here</a><br>
<b>=================================================================<br>
<br>
</b></div>
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<div align="center"><img
src="cid:part1.2Qu3ZL3V.rsr5n0hX@bilkent.edu.tr"
alt="" width="547" height="402" class=""></div>
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<div align="center"><br>
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<div align="center"><i>Gustave Boulanger (1824-1888)<br>
</i></div>
<div align="center"><i><br>
</i></div>
<div align="center"><i><br>
</i>
<div align="left">
<div align="left"><b><b><font color="#ff0000">Speaker:
</font> <a
href="https://im.uj.edu.pl/en/instytut/pracownik?id=170">Slawomir Rams</a></b></b></div>
<b><b><font color="#ff0000"><font color="#000000"> </font></font></b></b><b><b><font
color="#ff0000">Affiliation: </font><i>Jagiellonian<br>
<br>
</i></b></b></div>
<div align="left"><b><b><font color="#ff0000"> Title:
</font></b><b><font color="#ff0000"><font
color="#000000">Maximal configurations of
rational curves on K3-surfaces of high
degrees<br>
<br>
</font></font></b></b></div>
</div>
<div align="justify"><b><b><font color="#ff0000">Abstract: </font></b></b>One
of unexpected consequences of the orbibundle
Miyaoka-Yau-Sakai inequality is a bound on the
maximal number of rational degree-d curves on smooth
complex K3-surfaces of given degree obtained by
Miyaoka in 2009. After recalling the necessary
notions, in my talk I will present various results
concerning the question whether the above bound is
sharp for rational (resp. smooth rational) curves on
K3-surfaces of high degree. </div>
<div align="justify"><br>
</div>
<div align="justify">Based on joint work with M. Schuett
(Hannover) and A. Degtyarev (Ankara).</div>
<div align="justify"><br>
</div>
<div align="left"><font color="#ff0000"><font
color="#000000"><b><font color="#ff0000">Date:<font
color="#000000"> 14 November 2025, Friday</font></font></b></font></font></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><i><b>Participants who have registered will receive
the Zoom link via email one day before the
seminar.</b></i></p>
<p><i><b>If you registered for a previous talk in this
series, there's no need to register again—you'll
automatically receive the link for this session.</b></i></p>
<p><i><b href="mailto:sertoz@bilkent.edu.tr">If you
haven't registered yet, please contact <a
href="mailto:sertoz@bilkent.edu.tr"
class="moz-txt-link-freetext">sertoz@bilkent.edu.tr</a>
to be added to the mailing list.</b></i></p>
</blockquote>
<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"><br>
</div>
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<div align="center"><b><font color="#0080c0"><i><b><font
color="#0080c0"><i>This seminar series is
organized by a joint team from ODTÜ and
Bilkent<br>
<br>
Alexander Degtyarev (Bilkent)<br>
Ali Sinan Sertöz (Bilkent) contact
person<br>
Ali Ulaş Özgür Kişisel (ODTÜ)<br>
Yıldıray Ozan (ODTÜ)<br>
</i></font></b></i></font></b></div>
<div align="left"><br>
</div>
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<pre cols="72">----------------------------------------------------------------------------
Ali Sinan Sertöz
Bilkent University, Department of Mathematics, 06800 Ankara, Türkiye
Office: (90)-(312) - 290 1490
Department: (90)-(312) - 266 4377
e-mail: <a href="mailto:sertoz@bilkent.edu.tr" target="_blank"
class="gmail-moz-txt-link-freetext moz-txt-link-freetext">sertoz@bilkent.edu.tr</a>
Web: <a href="http://sertoz.bilkent.edu.tr" target="_blank">sertoz.bilkent.edu.tr</a>
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