TY - JOUR AU1 - Ban, Jung-Chao AU2 - Chang, Chih-Hung AU3 - Wu, Yu-Liang AU4 - Wu, Yu-Ying AB - We consider the existence of the topological entropy of shift spaces on a finitely generated semigroup whose Cayley graph is a tree. The considered semigroups include free groups. On the other hand, the notion of stem entropy is introduced. For shift spaces on a strict free semigroup, the stem entropy coincides with the topological entropy. We reveal a sufficient condition for the existence of the stem entropy of shift spaces on a semigroup. Furthermore, we demonstrate that the topological entropy exists in many cases and is identical to the stem entropy. TI - Stem and topological entropy on Cayley trees JF - Mathematical Physics Analysis and Geometry DO - 10.1007/s11040-021-09411-4 DA - 2022-03-01 UR - https://www.deepdyve.com/lp/springer-journals/stem-and-topological-entropy-on-cayley-trees-rlsfBQoEGe VL - 25 IS - 1 DP - DeepDyve ER -