For every affine algebraic group G over an algebraically closed field, every finite abelian subgroup A with |A| not divisible by the characteristic lies in some maximal torus up to index dividing the Grothendieck torsion index t(G).
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Finite abelian subgroups of algebraic groups
For every affine algebraic group G over an algebraically closed field, every finite abelian subgroup A with |A| not divisible by the characteristic lies in some maximal torus up to index dividing the Grothendieck torsion index t(G).