Abstract We will show that factor codes that have a bi-closing word are bi-closing a.e. and have a degree.
Moreover, a closing code with a bi-closing word into an irreducible shift space is constant-to-one. Then we study which
properties may be invariant by codes that have a bi-closing word under factoring and extension.
Moreover, we give some conditions for a bi-closing word and show that every closing open code in an irreducible shift space has a bi-closing word. ![Creative Commons License](https://i.creativecommons.org/l/by/4.0/80x15.png)
|