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searching for Cohomological invariant 2 found (7 total)

Markus Rost (250 words) [view diff] exact match in snippet view article find links to article

proof of the Bloch–Kato conjecture) and for the Rost invariant (a cohomological invariant with values in Galois cohomology of degree 3). Together with J

Grade (ring theory) (227 words) [view diff] exact match in snippet view article

{\displaystyle M} over a Noetherian ring R {\displaystyle R} is a cohomological invariant defined by vanishing of Ext-modules grade M = grade R M = inf {