Root datum: Difference between revisions

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In mathematics, the [[root datum]] ('''donnée radicielle''' in French) of a connected split [[reductive group|reductive]] [[algebraic group]] over a field is a generalization of a [[root system]] that determines the group up to isomorphism. They were introduced by M. Demazure in [[Grothendieck's Séminaire de géométrie algébrique|SGA III]], published in 1970.

==Definition==