English

Reflection maps

Algebraic Geometry 2017-10-24 v3

Abstract

Given a reflection group GG acting on a complex vector space VV, a reflection map is the composition of an embedding XVX \hookrightarrow V with the orbit map VCpV\to\mathbb C^p that maps a GG-orbit to a point. Reflection maps can be very singular, but we give tools to study them easily. We find obstructions to A\mathcal A-stability of reflection maps and produce, in the unobstructed cases, infinite families of A\mathcal A-finite map-germs of any corank. We also relate them to conjectures of L\^e, Mond and Ruas.

Keywords

Cite

@article{arxiv.1609.03222,
  title  = {Reflection maps},
  author = {G. Peñafort-Sanchis},
  journal= {arXiv preprint arXiv:1609.03222},
  year   = {2017}
}

Comments

33 pages, 11 figures. Comments are welcome. Changes in Version 3: Major revision of the exposition, clearer and simplified. Division into sections changed. Introduction, Final Remarks and other parts rewritten. Typos fixed. Changes in version 2: Improved results in Sections 13 and 15. Introduction and Final Remarks sections rewritten. Fixed typos