involutions of Grassmann Algebra: A Study on *-Central Polynomials, *-Identities, and * Isomorphisms
i Grassmann algebra, involutions, *-identities, *-isomorphisms, *-central polynomials
Let K be a field with characteristics different from two, E be the Grassmann algebra of a K-vector space with infinite and enumerable base L and φ be any involution. Based on the article (CENTRONE; GONCALVES; SILVA, 2020a), we present generating sets for the ∗ polynomial identities and ∗-central polynomials of Grassmann algebra, with a strong distinction between the cases char(K) = 0 and char(K) > 2. According to (DINIZ; GUIMARÃES; ROCHA), when φ satisfies certain conditions, we show that there is homogeneous involution φl (i.e., φl(L) = L) such that (E, φ) and (E, φl) are ∗-isomorphic. Furthermore, we present a necessary and sufficient condition for two homogeneous involutions to produce ∗-isomorphic structures. As a consequence, we obtained examples of ∗-PI-equivalent and not ∗-isomorphic algebras.