by Markus Rost (Preprint, May 86, 11 pages)
It is shown that the reduced norm K2(D) -> K2(F) for a quaternion algebra D is injective. The proof uses Swan's computation of the K-theory of quadrics. There is not much difference to the proof given by A. S. Merkurjev in May 1986 which appeared in the articles
An "elementary" proof of the result can be found in the preprint On Hilbert Satz 90 for K3 for quadratic extensions.
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