On the existence of universal rational structures for groups.
On Tits' conjecture and other questions concerning Artin and generalized Artin groups.
On universal theories of metabelian groups and the Shmel'kin embedding.
Positive eigenvalues and two-letter generalized words.
Problèmes d 'associativité des monoïdes et problèmes des mots pour les groupes
Recursively Presented Two Generated Infinite p-Groups.
Reduced Forms for Quadratic Words and Spines of 2-manifolds.
Regular geodesic languages and the falsification by fellow traveler property.
Representation of Markoff's binary quadratic forms by geodesics on a perforated torus
Representation of order automorphisms by words.
Rescuing the Whitehead Method for Free Products, I: Peak Reduction.
Rescuing the Whitehead Method for Free Products, II: The Algorithm.
Simple groups in computational group theory.
Small cancellation theory and automatic groups: Part II.
Some Algebraic Properties of Machine Poset of Infinite Words
The complexity of infinite words is considered from the point of view of a transformation with a Mealy machine that is the simplest model of a finite automaton transducer. We are mostly interested in algebraic properties of the underlying partially ordered set. Results considered with the existence of supremum, infimum, antichains, chains and density aspects are investigated.
Some Recent Results on Squarefree Words
Some Recognizable Properties of Solvable Groups.
String Matching And Algorithmic Problems In Free Groups.
Strongly geodesically automatic groups are hyperbolic.
Subgroup separability and conjugacy separability of certain HNN extensions.