Published online by Cambridge University Press: 16 May 2022
Let F be a field of characteristic zero, and let 
$UT_2$ be the algebra of 
$2 \times 2$ upper triangular matrices over F. In a previous paper by Centrone and Yasumura, the authors give a description of the action of Taft’s algebras 
$H_m$ on 
$UT_2$ and its 
$H_m$-identities. In this paper, we give a complete description of the space of multilinear 
$H_m$-identities in the language of Young diagrams through the representation theory of the hyperoctahedral group. We finally prove that the variety of 
$H_m$-module algebras generated by 
$UT_2$ has the Specht property, i.e., every 
$T^{H_m}$-ideal containing the 
$H_m$-identities of 
$UT_2$ is finitely based.
A. Estrada was partially supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.