English

Projective superflows. III. Finite subgroups of $U(2)$

Algebraic Geometry 2016-08-09 v1 Differential Geometry Representation Theory

Abstract

Let XRnX\in\mathbb{R}^{n} or Cn\mathbb{C}^{n}. For ϕ:RnRn\phi:\mathbb{R}^{n}\mapsto\mathbb{R}^{n} (respectively, ϕ:CnCn\phi:\mathbb{C}^{n}\mapsto\mathbb{C}^{n}) and tRt\in\mathbb{R} (respectively, C\mathbb{C}), we put ϕt=t1ϕ(Xt)\phi^{t}=t^{-1}\phi(Xt). A projective flow is a solution to the projective translation equation ϕt+s=ϕtϕs\phi^{t+s}=\phi^{t}\circ\phi^{s}, t,sRt,s\in\mathbb{R} or C\mathbb{C}. The projective superflow is a projective flow with a rational vector field which, among projective flows with a given symmetry, is, up to a homothety, unique and optimal. In the first and the second part of this work we classified real 22 and 33-dimensional supeflows over R\mathbb{R}. In this third part we classify all 22-dimensional complex superflows; that is, whose group of symmetries are finite subgroups of U(2)U(2). This includes both irreducible and reducible superflows.

Keywords

Cite

@article{arxiv.1608.02522,
  title  = {Projective superflows. III. Finite subgroups of $U(2)$},
  author = {Giedrius Alkauskas},
  journal= {arXiv preprint arXiv:1608.02522},
  year   = {2016}
}

Comments

9 pages

R2 v1 2026-06-22T15:15:07.227Z