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Line 1: In ~~mathematics~~mathematical [[group theory]], 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 [[Michel Demazure]] in [[Grothendieck's Séminaire de géométrie algébrique\|SGA III]], published in 1970. ==Definition==

Root datum: Difference between revisions