Abstract
We show that any right continuing factor code with retract 0 into an irreducible shift of finite type is right eresolving, and we give some sufficient conditions for a right eresolving almost everywhere code being right eresolving everywhere. Suberesolving codes as a generalization of ersolving codes have been introduced and we determine some shift spaces which preserved by suberesolving codes. Also, we show that any bi-eresolving (resp. bi-suberesolving) code on an irreducible shift of finite type (resp. a synchronized system) is open (resp. semi-open) and any right suberesolving code on a synchronized system is right continuing almost everywhere.
Publisher
Tamkang Journal of Mathematics
Subject
Applied Mathematics,General Mathematics