[Turkmath:6109] ODTU-Bilkent Algebraic Geometry Seminar-Zoom-530

[Ali Sinan Sertöz]

*Welcome to the 2023 Spring talks of ODTU-Bilkent Algebraic Geometry 
Seminars**
*
/since 2000/
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This week the ODTU-Bilkent Algebraic Geometry Seminar 
<http://www.bilkent.edu.tr/~sertoz/agseminar.htm>  is *online*

/This talk will begin at _*15:40*__ (GMT+3)_/
Please check your time difference between Ankara and your city here 
<https://www.timeanddate.com/worldclock/fixedtime.html?msg=ODT%C3%9C-Bilkent+Algebraic+Geometry+Seminar&iso=20230512T1540&p1=19>
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image.png
*
*/Gerald Harvey Jones (1933-2017)/ <https://pitzersart.com/artist/g-harvey>

**Speaker:Alexander Degtyarev <http://www.fen.bilkent.edu.tr/~degt/>
****Affiliation: /Bilkent/****
Title:Counting lines on polarized K3-surfaces

**
**Abstract:**
Counting or estimating the number of lines or, more generally, low 
degree rational curves on a polarized algebraic surface is a classical 
problem going back almost 1.5 centuries. After a brief historical 
excurse, I will try to give an account of the considerable progress made 
in the subject in the last decade or so, mainly related to various 
(quasi-)polarizations of K3-surfaces:

  * lines on K3-surfaces with any polarization,
  * lines on low degree K3-surfaces with singularities,
  * conics on low degree K3-surfaces.

If time permits, I will briefly discuss other surfaces/varieties as well.

Some parts of this work are joint projects
(some still in progress) with Ilia Itenberg, Słavomir Rams, Ali Sinan 
Sertöz.


*Date:12 May 2023*, *Friday*
*Time: 15:40 /(GMT+3)/*
*Place: **Zoom*

    **One day before the seminar, an announcement with the Zoom meeting
    link will be sent to those who registered with Sertöz.
    **

    **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.
    **

    **If you have not registered before, please contact him at
    sertoz at bilkent.edu.tr
    <mailto:sertoz at bilkent.edu.tr?subject=Zoom%20Seminar%20Address%20Request>.**


You are most cordially invited to attend.

Ali Sinan Sertöz
/(PS: To unsubscribe from this list please send me a note.)/
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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:sertoz at bilkent.edu.tr  
Web:sertoz.bilkent.edu.tr  <http://sertoz.bilkent.edu.tr>  
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