ON THE FREIHEITSSATZ IN CERTAIN ONE-RELATOR FREE PRODUCTS. III
Robert Shwartz · Proceedings of the Edinburgh Mathematical Society · 2002
Abstract We study one-relator free products in which the relator has free-product length $4$. We find conditions for such presentations to have a Freiheitssatz and classify all non-aspherical presentations under certain conditions. AMS 2000 Mathematics subject classification: Primary 20F05; 20F06; 20F10