The Waring Problem for Matrix Algebras, II

Matej Brešar, Peter Šemrl

Let $f$ bea noncommutativepolynomial of degree $m\ge 1$ over an algebraically closed field $F$ of characteristic $0$. If $n\ge m-1$ and ${\alpha }_1,{\alpha }_2,{\alpha }_3$ are nonzero elements from $F$…