#### Volume 12, issue 3 (2008)

 Recent Issues
 The Journal About the Journal Subscriptions Editorial Board Editorial Interests Editorial Procedure Submission Guidelines Submission Page Author Index To Appear ISSN (electronic): 1364-0380 ISSN (print): 1465-3060
Degenerations of quadratic differentials on $\mathbb{CP}^1$

### Corentin Boissy

Geometry & Topology 12 (2008) 1345–1386
##### Abstract

We describe the connected components of the complement of a natural “diagonal” of real codimension $1$ in a stratum of quadratic differentials on ${ℂℙ}^{1}$. We establish a natural bijection between the set of these connected components and the set of generic configurations that appear on such “flat spheres”. We also prove that the stratum has only one topological end. Finally, we elaborate a necessary toolkit destined to evaluation of the Siegel–Veech constants.