Daniel Naie
Published 2006-03-17, updated 2006-04-10Version 2
A formula for the irregularity of a cyclic multiple plane associated to a branch curve that has arbitrary singularities and is transverse to the line at infinity is established. The irregularity is expressed as a sum of superabundances of linear systems associated to some multiplier ideals of the branch curve and the proof rests on the theory of standard cyclic coverings. Explicit computations of multiplier ideals are performed and some applications are presented.
Comments: The introduction was modified and the bibliography accordingly. 25 pages
A note on Mustata's computation of multiplier ideals of hyperplane arrangements
Multiplier ideals of normal surface singularities
Multiplier ideals of plane curve singularities via Newton polygons
![QR code for arXiv:math/0603427 [math.AG]](http://oss.arxitics.com/images/favicon.svg)