Abstract:
Let $P=\mathrm{GF}(q)$ be a field, $F=\mathrm{GF}(q^n)$ be an extension of $P$. We construct a wide class of skew MP-polynomials over $F$ by the description of multipliers of skew MP LRS. For $P$-skew MP LRS $v$ over $F$ we call linear transformation $\psi$(generalized) multiplier if there exists a number $l\geq0$ such that $\psi(v(i))=v(i+l)$, $i\geq0$. Denote by $\mathfrak M(v)^*$ the set of all multipliers of a skew MP LRS $v$, and $\mathfrak M(v)=\mathfrak M(v)^*\cup\{0\}$. It is proved that $\mathfrak M(v)$ is a field and $\mathfrak M(v)\cong F$ if and only if $v$ is linearized. Sufficient conditions for $\mathfrak M(v)\cong P$ are given. It is proved that for any $P$-skew MP LRS $v$ there exists a transformation $\psi$ such that the sequence $\psi(v)$ is $\mathfrak M(v)$-skew MP LRS of the same order, and for any field $K<F$ there exists MP LRS $v$ such that $\mathfrak M(v)\cong K$.
Key words:skew linear recurrence, skew polynomial of maximal period, generalized multiplier, maximal non-reducible sequence.