#
Groupoids, the Phragmen-Brouwer Property, and the Jordan Curve Theorem

##
Ronald Brown

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.

Journal of Homotopy and Related Structures, Vol. 1(2006), No. 1, pp. 175-183
http://jhrs.rmi.acnet.ge/volumes/2006/n1a7/