English

On the roots of an extended lens equation and an application

Algebraic Geometry 2015-10-21 v2

Abstract

We consider a certain mixed polynomial which is an extended Lens equation Ln,m=zˉmp(z)/q(z)L_{n,m}=\bar z^m-p(z)/q(z) with degreeq=n\text{degree}\, q=n, degreep<n\text{degree}\, p<n whose numerator is a mixed polynomial of degree (n+m;n,m)(n+m;n,m). Then we consider its deformation of type Ln,m+ϵ/zmL_{n,m}+\epsilon/z^m to construct a special mixed polynomial of degree (n+2m;n+m,m)(n+2m;n+m,m) with 5n5n zeros. This generalizes an example of Rhie. We give an application to the number of connected components of the moduli space of strongly mixed weighted homogeneous polynomials of two variables with isolated singularity at the origin.

Keywords

Cite

@article{arxiv.1505.03576,
  title  = {On the roots of an extended lens equation and an application},
  author = {Mutsuo Oka},
  journal= {arXiv preprint arXiv:1505.03576},
  year   = {2015}
}

Comments

21 pages, 7 eps files