Research output: Contribution to journal › Article › peer-review
Bounded generation and commutator width of Chevalley groups: function case. / Kunyavski, Boris; Plotkin, Eugene; Vavilov, Nikolai .
In: European Journal of Mathematics, Vol. 9, 53, 18.05.2022.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Bounded generation and commutator width of Chevalley groups: function case
AU - Kunyavski, Boris
AU - Plotkin, Eugene
AU - Vavilov, Nikolai
N1 - Kunyavskiĭ, B., Plotkin, E. & Vavilov, N. Bounded generation and commutator width of Chevalley groups: function case. European Journal of Mathematics 9, 53 (2023). https://doi.org/10.1007/s40879-023-00627-y
PY - 2022/5/18
Y1 - 2022/5/18
N2 - We prove that Chevalley groups over polynomial rings $\mathbb F_q[t]$ and over Laurent polynomial $\mathbb F_q[t,t^{-1}]$ rings, where $\mathbb F_q$ is a finite field, are boundedly elementarily generated. Using this we produce explicit bounds of the commutator width of these groups. Under some additional assumptions, we prove similar results for other classes of Chevalley groups over Dedekind rings of arithmetic rings in positive characteristic. As a corollary, we produce explicit estimates for the commutator width of affine Kac--Moody groups defined over finite fields. The paper contains also a broader discussion of the bounded generation problem for groups of Lie type, some applications and a list of unsolved problems in the field.
AB - We prove that Chevalley groups over polynomial rings $\mathbb F_q[t]$ and over Laurent polynomial $\mathbb F_q[t,t^{-1}]$ rings, where $\mathbb F_q$ is a finite field, are boundedly elementarily generated. Using this we produce explicit bounds of the commutator width of these groups. Under some additional assumptions, we prove similar results for other classes of Chevalley groups over Dedekind rings of arithmetic rings in positive characteristic. As a corollary, we produce explicit estimates for the commutator width of affine Kac--Moody groups defined over finite fields. The paper contains also a broader discussion of the bounded generation problem for groups of Lie type, some applications and a list of unsolved problems in the field.
KW - Chevalley groups
KW - elementary generators
KW - commutators
KW - bounded generation
KW - Dedekind rings of arithmetic type
KW - Chevalley groups
KW - Kac–Moody groups
KW - bounded generation
KW - Polynomial rings
KW - First order rigidity
UR - https://www.researchgate.net/publication/360186542_Bounded_generation_and_commutator_width_of_Chevalley_groups_function_case
U2 - 10.48550/arXiv.2204.10951
DO - 10.48550/arXiv.2204.10951
M3 - Article
VL - 9
JO - European Journal of Mathematics
JF - European Journal of Mathematics
SN - 2199-675X
M1 - 53
ER -
ID: 94653663