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- José Burillo, José Burillo
- 1999

The goal of this paper is to construct quasi-isometrically embedded subgroups of Thompson’s group F which are isomorphic to F × Zn for all n. A result estimating the norm of an element of Thompson’s group is found. As a corollary, Thompson’s group is seen to be an example of a finitely presented group which has an infinite-dimensional asymptotic cone. The… (More)

- José Burillo, José Burillo
- 1995

In this paper it is proved that if a finitely presented group acts properly discontinuously, cocompactly and by isometries on a simply connected Riemannian manifold, then the two Dehn functions, of the group and of the manifold, respectively, are equivalent. 1. Dehn functions and their equivalence Let X be a simply connected 2-complex , and let w be an edge… (More)

We discuss metric and combinatorial properties of Thompson’s group T , including normal forms for elements and unique tree pair diagram representatives. We relate these properties to those of Thompson’s group F when possible, and highlight combinatorial differences between the two groups. We define a set of unique normal forms for elements of T arising from… (More)

- José Burillo
- 2001

The distance from the origin in the word metric for generalizations F (p) of Thompson’s group F is quasi-isometric to the number of carets in the reduced rooted tree diagrams representing the elements of F (p). This interpretation of the metric is used to prove that several types of embeddings of groups F (p) into each other are quasi-isometric embeddings,… (More)

- José Burillo
- Geometric and Computational Perspectives on…
- 1994

- José Burillo, Sean Cleary
- 2005

Here we describe the results of some computational explorations in Thompson’s group F . We describe experiments to estimate the cogrowth of F with respect to its standard finite generating set, designed to address the subtle and difficult question whether or not Thompson’s group is amenable. We also describe experiments to estimate the exponential growth… (More)

The distance from the origin in the word metric for generalizations F (p) of Thompson’s group F is quasi-isometric to the number of carets in the reduced rooted tree diagrams representing the elements of F (p). This interpretation of the metric is used to prove that several types of embeddings of groups F (p) into each other are quasi-isometric embeddings,… (More)

- Martin R. Bridson, José Burillo, Murray Elder, Zoran Sunic
- IJAC
- 2012

This note records some observations concerning geodesic growth functions. If a nilpotent group is not virtually cyclic then it has exponential geodesic growth with respect to all finite generating sets. On the other hand, if a finitely generated group G has an element whose normal closure is abelian and of finite index, then G has a finite generating set… (More)

Here we describe the results of some computational explorations in Thompson’s group F . We describe experiments to estimate the cogrowth of F with respect to its standard finite generating set, designed to address the subtle and difficult question whether or not Thompson’s group is amenable. We also describe experiments to estimate the exponential growth… (More)

Thompson’s groups have been extensively studied since their introduction by Thompson in the 1960s, despite the fact that Thompson’s account [7] appeared only in 1980. They have provided examples of infinite finitely presented simple groups, as well as some other interesting counterexamples in group theory (see for example, Brown and Geoghegan [3]). Cannon,… (More)