Title: Groupoids, the Phragmen-Brouwer Property,  and the Jordan
Curve Theorem
Author: Ronald Brown
Author's e-mail address: r.brown  at bangor.ac.uk 
 Author's mailing address: Mathematics Department, School of Informatics, University of Wales, 
 Bangor, Gwynedd LL57 1UT, UK
 Author's web site: www.bangor.ac.uk/r.brown
 Preprint:   University of Wales Math Preprint 06.01
 Abstract: We publicise a proof of the Jordan Curve Theorem which relates it
to the Phragmen-Brouwer Property, and whose proof uses the van
Kampen theorem for the fundamental groupoid on a set of base
points.