报告人：班荣超教授 （台湾东华大学）

地点：维格堂319

时间：2018.1.26 上午10：00-11：00
题目：On the degree of the subshifts of finite type on free semigroups I
摘要：In this talk, we first recall some definitions and  important results on the degree of tree-shifts of finite type. Some familiar methods of proving such problem will be given and the detailed proof of our result will be given in the second talk.

报告人：班荣超教授（台湾东华大学）

时间：2018.1.26 上午11：00-12：00

题目：On the degree of the subshifts of finite type on free semigroups II

摘要：In this talk, we give an algebraic characterization of the degree of tree-shifts of finite type . An effective method, namely the systems of nonlinear recursive equations (SNRE) method, is introduced to compute the explicit value of the degree of a TSFT. This extends the previous result of D. Lind on one-dimensional SFTs and provides a new method of the study of multidimensional SFTs.