A criterion for a central simple algebra to be split
نویسندگان
چکیده
In these notes we give a criterion for a central simple algebra A to be split in terms of the essential dimension of the algebraic group SL1(A). This criterion also provides an example of an algebraic group G with ed(G) = n which does not possess any non-trivial cohomological invariant. 2000 Mathematics Subject Classification: 11E72, 16K20.
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