PRODUCTS OF INVOLUTIONS IN THE VERSHIK-KEROV GROUP

Authors

  • Nguyen Phu Thinh
  • Trinh Quoc Huy
  • Nguyen Anh Sy

DOI:

https://doi.org/10.54607/hcmue.js.22.10.4764(2025)

Abstract

Let  be an arbitrary field. Denote by  the group of all infinite matrices of the form  where  is an  matrix with determinant  for some positive integer , and  is an infinite upper triangular matrix with all diagonal entries equal to . In this paper, we prove that every matrix in  can be expressed as the product of at most four commutators. This result provides a solution to Problem 8 in Nguyen (2024).

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References

Nguyen, T. T. H. (2024). A survey of lengths of linear groups with respect to certain generating sets. Communications of the Korean Mathematical Society, 39(2), 279-302. https://doi.org/10.4134/CKMS.c230058

Gustafson, W. H., Halmos, P. R., & Radjavi, H. (1976). Products of involutions. Linear Algebra and Its Applications, 13, 157-162.

Hou, X., Li, S., & Zheng, Q. (2017). Expressing infinite matrices over rings as products of involutions. Linear Algebra and Its Applications, 532, 257-265.

Hou, X. (2019). Decomposition of infinite matrices into products of commutators of involutions. Linear Algebra and Its Applications, 563, 231-239. https://doi.org/10.1016/j.laa.2018.11.001

Published

2025-10-30

Issue

Section

Bài viết