Lh. Rowen et Y. Segev, The finite quotients of the multiplicative group of a division algebra of degree 3 are solvable, ISR J MATH, 111, 1999, pp. 373-380
Let D be a finite dimensional division algebra. It is known that in a varie
ty of cases, questions about the normal subgroup structure of D-x (the mult
iplicative group of D) can be reduced to questions about finite quotients o
f D-x. In this paper we prove that when deg(D) = 3, finite quotients of D-x
are solvable. The proof uses Wedderburn's Factorization Theorem.