Affiliation:
1. Departamento de Computación, FCEyN, Universidad de Buenos Aires, Buenos Aires, Argentina
Abstract
This paper is concerned with the problem of asphericity of 2-complexes associated to labeled oriented trees (LOTs), which are combinatorial models of ribbon disc complements. The concept of good enumeration for LOTs is introduced and applied to the study of asphericity and local indicability. We describe a large class of LOTs, which includes some families of non-injective LOTs of any diameter and complexity, that present locally indicable groups.
Funder
Consejo Nacional de Investigaciones Cientfíicas y Técnicas
Publisher
World Scientific Pub Co Pte Ltd
Subject
Algebra and Number Theory