Seminars: K. V. Shakhmatov, G_a-actions of vertical type on affine T-varieties

SEMINARS


Seminar of the Laboratory on Algebraic Transformation Groups HSE University April 2, 2021 19:00, Moscow, for the Zoom link please write to yzaytseva@hse.ru

G_a-actions of vertical type on affine T-varieties K. V. Shakhmatov National Research University "Higher School of Economics", Moscow
https://youtu.be/3ePz-LYS1bU Abstract: We will discuss the paper due to A. Liendo. $\mathbb{G}_a$-actions of fiber type on affine $T$-varieties. J. Algebra 324 (2010), 3653-3665. We will talk about locally nilpotent derivations of vertical type and their classification for algebras $\mathcal{O}(X)$ for a normal affine $T$-variety $X$. Also we will discuss a general description for birational equivalence classes of affine varieties with Makar-Limanov invariant. Website: https://math.hse.ru/latg/seminar