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math.RT2004★ 3 cited
Finite good filtration dimension for modules over an algebra with good filtration
Wilberd van der Kallen
Let G be a connected reductive linear algebraic group over a field k of characteristic p>0. Let p be large enough with respect to the root system. We show that if a finitely genera…
math.RT2001
Cohomology with Grosshans graded coefficients
Wilberd van der Kallen
Let the reductive group G act on the finitely generated commutative k-algebra A. We ask if the finite generation property of the ring of invariants A^G extends to the full rational…
math.RT1999
Steinberg modules and Donkin pairs
Wilberd van der Kallen
We prove that in positive characteristic a module with good filtration for a group of type E6 restricts to a module with good filtration for a subgroup of type F4. (Recall that a f…