Identities in differential perm algebras

Abstract

Let $(P,\cdot ,d)$ be a differential perm algebra over a field of characteristic zero, i.e. an associative algebra satisfying $(ab)c=(ba)c$ and equipped with a derivation $d$. We study polynomial identities in the algebras obtained by the derived operations \[ a\prec b=ab',\quad a\succ b=a'b,\quad a\blacklozenge b=ab'+ba',\quad a\bullet b=a'b+ab',\quad a\Diamond b=ab'-ba',\quad a\circ b=a'b-ab', \] where $a^{\prime }=d(a)$. We first prove that any nontrivial differential polynomial identity that does not belong to the right annihilator of the free differential perm algebra implies a differential identity of the form $a_1^{\prime }{a}_2^{\prime }\cdots a_m^{\prime }=0$ for some positive integer $m$. We then obtain explicit generating sets and determine the dimensions of the multilinear homogeneous components of the subalgebras of the free differential perm algebra generated by $X$ with respect to the products $⧫$ and $\bullet$. Finally, we construct perm-Witt type Lie and Leibniz algebras arising naturally from differential perm algebras.

arXiv comment27 p