Neither G_9(Q) nor G_(11)(Q) Is a Subgroup of K_2(Q)

摘要

It is proved that neither G9(Q) nor G11(Q) is a subgroup of K2(Q),which confirms two special cases of a conjecture proposed by Browkin,J.(Lecture Notes in Math.,966,Springer-Verlag,New York,Heidelberg,Berlin,1982,1-6).