Abstract
In a previous paper the author determined all possible cohomological invariants of Aut ( J ) -torsors in Galois cohomology with mod 2 coefficients, where J is a split central simple Jordan algebra of odd degree n ⩾ 3 . In the present paper we extend these results to a larger class of groups G n 1 , … , n d r indexed by r = 0 , 1, 2 or 3, and n i positive integers that add to n ⩾ 3 such that n 1 is odd. We also give precise values for the essential dimension of these groups.
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