FURTHER RESULTS ON MONOIDS ACTING ON TREES
John Rhodes, Pedro V. Silva · International Journal of Algebra and Computation · 2012
This paper further develops the theory of arbitrary semigroups acting on trees via elliptic mappings. A key tool is the Lyndon–Chiswell length function L for the semigroup S which allows one to construct a tree T and an action of S on T via elliptic maps. Improving on previous results, the length function of the action will also be L.