Generalized shifts through derivations' concept in ${\ell }^p(\tau )$ spaces

Safoura Arzanesh, Fatemah Ayatollah Zadeh Shirazi, Arezoo Hosseini

In the following text for $p\in [1,\infty ]$, nonzero cardinal number $\tau$, self--map $\phi :\tau \to \tau$ if there exists $N\in \mathbb{N}$ such that ${\phi }^{-1}(\alpha )$ has at most $N$ elements for eac…