Artem Avilov
(HSE)
G-birationally rigid del Pezzo threefolds
In this talk we will consider rational del Pezzo threefolds of
degree 2. We will classify the ones which are G-birationally rigid
for some finite group. In particular we will find several embeddings
of S4 into the space Cremona group.
Olivier
Haution (LMU)
The cobordism ring of algebraic involutions
I will provide an elementary definition of the cobordism ring of
involutions of smooth projective varieties over a field (of
characteristic not 2). I will describe its structure, and give
explicit "stable" polynomial generators. I will draw some concrete
consequences concerning the geometry of fixed loci of involutions,
in terms of Chern numbers. I will in particular mention an algebraic
version of Boardman's five halves theorem.
Hsueh-Yung
Lin (IPMU)
Algebraic approximations of compact Kähler threefolds
Let X be a compact Kähler manifold. The so-called Kodaira problem
asks whether X has arbitrarily small deformations to some projective
varieties. We will provide an overview of the proof showing that
such deformations always exist for compact Kähler threefolds.
Sheng Meng
(KIAS)
Jordan property for varieties
A group is Jordan if all its finite subgroups are "almost" abelian
(up to a bounded index). Such property is related to several
boundedness problems.
In this talk, I'll survey several known results and technique on
automorphism groups of varieties.
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