A flat plane that is not the limit of periodic flat planes.
A spelling theorem for staggered generalized 2-complexes, with applications.
Artin Groups and Infinite Coxeter Groups.
Asphericity of symmetric presentations
Using the notion of relative presentation due to Bogley and Pride, we give a new proof of a theorem of Prishchepov on the asphericity of certain symmetric presentations of groups. Then we obtain further results and applications to topology of low-dimensional manifolds.