# THE JORDAN CONSTANT FOR CREMONA GROUP OF RANK 2

• Yasinsky, Egor (Steklov Mathematical Institute of Russian Academy of Sciences)
• Accepted : 2017.02.13
• Published : 2017.09.30

#### Abstract

We compute the Jordan constant for the group of birational automorphisms of a projective plane ${\mathbb{P}}^2_{\mathbb{k}}$, where ${\mathbb{k}}$ is either an algebraically closed field of characteristic 0, or the field of real numbers, or the field of rational numbers.

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