Algebraic groups | Theorems in algebraic geometry

Kempf vanishing theorem

In algebraic geometry, the Kempf vanishing theorem, introduced by Kempf, states that the higher cohomology group Hi(G/B,L(λ)) (i > 0) vanishes whenever λ is a dominant weight of B. Here G is a reductive algebraic group over an algebraically closed field, B a Borel subgroup, and L(λ) a line bundle associated to λ. In characteristic 0 this is a special case of the Borel–Weil–Bott theorem, but unlike the Borel–Weil–Bott theorem, the Kempf vanishing theorem still holds in positive characteristic. and found simpler proofs of the Kempf vanishing theorem using the Frobenius morphism. (Wikipedia).

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Related pages

Borel–Weil–Bott theorem | Algebraically closed field | Borel subgroup | Characteristic (algebra) | Algebraic geometry