306 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade do PortoPT174 papers
- University of CoimbraPT98 papers
- University of MinhoPT81 papers
- University of LisbonPT24 papers
- Centre National de la Recherche ScientifiqueFR22 papers
- Instituto Superior TécnicoPT22 papers
- UCLouvainBE13 papers
- Universidade Federal da BahiaBR13 papers
- Centro de Análise Matemática Geometria e Sistemas DinâmicosPT10 papers
- Pontifícia Universidade Católica do Rio de JaneiroBR10 papers
- Universidad de La LagunaES9 papers
- Universidade Federal do Rio de JaneiroBR9 papers
5 papers · 2 filters
On periodic points of free inverse monoid endomorphisms
Emanuele Rodaro, Pedro V. Silva
It is proved that the periodic point submonoid of a free inverse monoid endomorphism is always finitely generated. Using Chomsky's hierarchy of languages, we prove that the fixed p…
Bounding the gap between a free group (outer) automorphism and its inverse
Manuel Ladra, Pedro V. Silva, Enric Ventura
For any finitely generated group , two complexity functions and are defined to measure the maximal possible gap between the norm of an automorphism (respectively out…
Fixed points of endomorphisms of graph groups
Emanuele Rodaro, Pedro V. Silva, Mihalis Sykiotis
It is shown, for a given graph group , that the fixed point subgroup Fix is finitely generated for every endomorphism of if and only if is a free product of fre…
Markov semigroups, monoids, and groups
Alan J. Cain, Victor Maltcev
A group is Markov if it admits a prefix-closed regular language of unique representatives with respect to some generating set, and strongly Markov if it admits such a language of u…
Context-free rewriting systems and word-hyperbolic structures with uniqueness
Alan J. Cain, Victor Maltcev
This paper proves that any monoid presented by a confluent context-free monadic rewriting system is word-hyperbolic. This result then applied to answer a question asked by Duncan &…