Bilkent University Topology Seminars

Lines generate the Picard group of a Fermat surface
Alex Degtyarev
Bilkent University, Turkey
Özet : I will explain a purely topological solution of a long standing algebra-geometric problem, viz. the so-called Shioda conjecture. After a brief introduction to the subject, I will state the problem and reduce it to the computation of the fundamental group (or, rather, properly understood Alexander module) of a certain arrangement of lines in the plane. Then, in the bulk of the talk, I will try to explain this computation in detail: We will discuss the braid monodromy, Zariski--van Kampen theorem (with its pros and contras) computing the fundamental group of a plane curve, and, essentially, Fox' free calculus explained via cellular complexes. The talk will largely be accessible to graduate and senior undergraduate students. At the end of the talk I am planning to discuss the generalizations to the so-called Delsarte surfaces and state a few open problems that may constitute a master or Ph.D. project.
  Tarih : 25.11.2019
  Saat : 13:40
  Yer : SA - 141
  Dil : English
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