Abstract
We present criteria for a pair of maps to constitute a quaternion-symbol equivalence (or a Hilbert-symbol equivalence if we deal with global function fields) expressed in terms of vanishing of the Clifford invariant. In principle, we prove that a local condition of a quaternion-symbol equivalence can be transcribed from the Brauer group to the Brauer-Wall group.
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Koprowski, P. Graded quaternion symbol equivalence of function fields. Czech Math J 57, 1311–1319 (2007). https://doi.org/10.1007/s10587-007-0125-x
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DOI: https://doi.org/10.1007/s10587-007-0125-x