*-polynomial identities of 4x4 upper triangular matrices with the reflection involution

Ronald Ismael Quispe Urure

Let $U{T}_4(F)$ be $4\times 4$ upper triangular matrix algebra over a field $F$ of characteristic zero and let $\mathcal{A}$ be the subalgebra of $U{T}_4(F)$ linearly generated by $\{\…