Morse theory with the norm-square of a hyperkahler moment map
Symplectic Geometry
2014-10-16 v1 Algebraic Geometry
Abstract
We prove that the norm-square of a moment map associated to a linear action of a compact group on an affine variety satisfies a certain gradient inequality. This allows us to bound the gradient flow, even if we do not assume that the moment map is proper. We describe how this inequality can be extended to hyperkahler moment maps in some cases, and use Morse theory with the norm-squares of hyperkahler moment maps to compute the Betti numbers and cohomology rings of all toric hyperkahler orbifolds.
Keywords
Cite
@article{arxiv.1205.4260,
title = {Morse theory with the norm-square of a hyperkahler moment map},
author = {Jonathan Fisher},
journal= {arXiv preprint arXiv:1205.4260},
year = {2014}
}
Comments
23 pages, comments welcome