Braid Group techniques in Complex Geometry V: The fundamental group of the complement of a Veronese generic projection
Abstract
Description
Computation of the fundamental group of the complement in the complex plane of the branch curve S , of a generic projection of the Veronese surface to the plane is presented. This paper is a continuation of our previous papers: Braid Group Technique I - IV. In I and II we developed algorithms to compute braid monodromy of a brunch curve, provided there exist a degeneration of the surface to union of planes in a configuration where the associated branch curve is partial to a line arrangement dual to generic. In III we constructed a degeneration of the Veronese surface of order 3 to union of planes with the desired property and in IV we used I -III to compute the braid monodromy of the associated branch curve. Here we use the Van-Kampen method to compute the fundamental group of the complement from a braid monodromy factorization and some extra properties of the factorization , namely invariant properties, also proven in IV. The group is presented using a certain quotient of the Braid group defined by transversal half-twists.
125 pages, amstex, figures by request. To be published in "Communications in Analysis and Geometry"
125 pages, amstex, figures by request. To be published in "Communications in Analysis and Geometry"