$\mathbb {F} _ {q} $ with $ q $ elements. In this paper we consider the basic (complex)
characters of $ U_ {n}(q) $ and we prove that every irreducible (complex) character of $ U_
{n}(q) $ is a constituent of a unique basic character. This result extends a previous result
which was proved by the author under the assumption $ p\geq n $, where $ p $ is the
characteristic of the field $\mathbb {F} _ {q} $. References