Wells, Charles Centralizers of transitive semigroup actions and endomorphisms of trees. (English) Zbl 0342.20034 Pac. J. Math. 64, 265-271 (1976). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents MSC: 20M20 Semigroups of transformations, relations, partitions, etc. 05C05 Trees 08Axx Algebraic structures 20B25 Finite automorphism groups of algebraic, geometric, or combinatorial structures PDF BibTeX XML Cite \textit{C. Wells}, Pac. J. Math. 64, 265--271 (1976; Zbl 0342.20034) Full Text: DOI OpenURL