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<div align="center"><big><b><big>Welcome to the 2024 Fall
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" moz-do-not-send="true">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=20241025T1540&p1=19&ah=1"
target="_blank" moz-do-not-send="true">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.W9qlMVpQ.ms07pG9q@bilkent.edu.tr"
alt="" width="391" height="480" class=""></div>
</div>
<div align="center"><br>
</div>
<div align="center"><i>Claude Monet (1840-1926)</i><br>
<div align="left"><b><b><font color="#ff0000"><br>
</font></b></b></div>
<div align="left"><b><b><font color="#ff0000">Speaker:</font>
<a href="http://www.fen.bilkent.edu.tr/%7Edegt/"
moz-do-not-send="true">Alexander Degtyarev</a><font
color="#ff0000"><font color="#000000"> <br>
</font></font></b></b><b><b><font
color="#ff0000">Affiliation: </font><i>Bilkent<br>
</i></b></b></div>
<div align="left"><b><b><i><br>
</i></b></b></div>
<div align="left"><b><b><font color="#ff0000"> Title: </font></b>Real
plane sextic curves with smooth real part<b><font
color="#ff0000"><font color="#000000"> <br>
<br>
</font></font></b></b></div>
</div>
<div align="left"><b><b><font color="#ff0000">Abstract: </font></b></b>We
have obtained the complete deformation classification of
singular real plane sextic curves with smooth real part,
i.e., those without real singular points. This was made
possible due to the fact that, under the assumption,
contrary to the general case, the equivariant
equisingular deformation type is determined by the
so-called real homological type in its most naïve sense,
i.e., the homological information about the
polarization, singularities, and real structure; one
does not need to compute the fundamental polyhedron of
the group generated by reflections and identify the
classes of ovals therein. Should time permit, I will
outline our proof of this theorem.<br>
<br>
As usual, this classification leads us to a number of
observations, some of which we have already managed to
generalize. Thus, we have an Arnol’d-Gudkov-Rokhlin type
congruence for close to maximal surfaces (and, hence,
even degree curves) with certain singularities. Another
observation (which has not been quite understood yet and
may turn out K3-specific) is that the contraction of any
empty oval of a type I real scheme results in a
bijection of the sets of deformation classes.<br>
(joined work with Ilia Itenberg)<br>
<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"> 25 October 2024</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" moz-do-not-send="true">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>
<pre cols="72">----------------------------------------------------------------------------
Ali Sinan Sertöz
Bilkent University, Department of Mathematics, 06800 Ankara, Türkiye
Office: (90)-(312) - 290 1490
Department: (90)-(312) - 266 4377
Fax: (90)-(312) - 290 1797
e-mail: <a href="mailto:sertoz@bilkent.edu.tr" target="_blank"
class="gmail-moz-txt-link-freetext moz-txt-link-freetext"
moz-do-not-send="true">sertoz@bilkent.edu.tr</a>
Web: <a href="http://sertoz.bilkent.edu.tr" target="_blank"
moz-do-not-send="true">sertoz.bilkent.edu.tr</a>
----------------------------------------------------------------------------</pre>
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