Resumen de On the Kneser�Tits problem for triality forms

Gopal Prasad

• The purpose of this paper is to provide a concrete description of the �Whitehead group�� W(k,G) := G(k)/G(k)+ for the simply connected triality forms G of k-rank 1, and to use this description to prove that if k is a global field, then the Kneser�Tits problem for these forms has an affirmative solution.