Abstract:
We show that the Cremona group of rank $2$ over a finite field is Jordan, and provide an upper bound for its Jordan constant which is sharp when the number of elements in the field is different from $2$, $4$, and $8$.
Citation:
Yuri G. Prokhorov, Constantin A. Shramov, “Jordan Property for the Cremona Group over a Finite Field”, Algebra and Arithmetic, Algebraic, and Complex Geometry, Collected papers. In memory of Academician Alexey Nikolaevich Parshin, Trudy Mat. Inst. Steklova, 320, Steklov Math. Inst., Moscow, 2023, 298–310; Proc. Steklov Inst. Math., 320 (2023), 278–289