On representation varie ties of some HNN-extensions of free groups

  • Alexandra N. Admiralova Belarusian State University, Niezaliežnasci Avenue, 4, 220030, Minsk, Belarus
  • Valery V. Beniash-Kryvets Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk, Belarus

Abstract

In the article we provide the description of the structure and the properties of representation varieties Rn(G(p,q)) of the groups with the presentation G(p,q) = ‹x1,…, x2, t|t(x12xg2)q›, where g ≥ 3, |p| > q ≥ 1. Irreducible components of Rn(G(p,q)) are found, their dimensions are calculated and it is proved, that every irreducible component of Rn(G(p,q)) is a rational variety.

Author Biographies

Alexandra N. Admiralova, Belarusian State University, Niezaliežnasci Avenue, 4, 220030, Minsk, Belarus

postgraduate student at the department of higher algebra and information security, faculty of mathematics and mechanics

Valery V. Beniash-Kryvets, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk, Belarus

doctor of science (physics and mathematics), full professor; head of the department of higher algebra and information security, faculty of mathematics and mechanics

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Published
2019-01-19
Keywords: a group presentation, a representation variety, a dimension of a variety, a rational variety
How to Cite
Admiralova, A. N., & Beniash-Kryvets, V. V. (2019). On representation varie ties of some HNN-extensions of free groups. Journal of the Belarusian State University. Mathematics and Informatics, 2, 10-16. Retrieved from https://journals.bsu.by/index.php/mathematics/article/view/779