Characterizations and properties of principal $(f,\sigma ,\delta )$-codes over rings

Mhammed Boulagouaz, Abdulaziz Deajim

Let $A$ be a ring with identity, $\sigma$ a ring endomorphism of $A$ that maps the identity to itself, $\delta$ a $\sigma$-derivation of $A$, and consider the skew-polynomial ring $A[X;\sigma ,\delta ]$. Whe…