Wilberd van der Kallen

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Name	Wilberd van der Kallen
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Website	xs4all.nl/~wilberdk/home.html
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Does the action of an affine group scheme preserve the nilradical of an algebra?

ag.algebraic-geometry algebraic-groups

jun 21 11 at 12:59 Angelo 19.8k●3●47●75

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universal cover of SL2(R): does it admit central extensions?

Is Lusztig’s conjecture solved?

Non-finite version of Nakayama’s lemma?

Question about the representation theory of SL(n,Z)

Tensor Product of Witt Vectors

Proper subgroup of GL(n,Z) isomorphic to GL(n,Z)?

Subgroups of $GL_n(\mathbb Z)$ with finite coinvariants

Isomorphism between varieties of char 0

Are homogeneous components of f.g graded modules f.g ?

Connected components of the orthogonal group O(2n) in characteristic 2.

A question about the additive group of a finitely generated integral domain

Can the ‘linkages’ between equivalent extensions of modules of an algebraic group be taken to have bounded length?

Intersections of conjugates of the icosahedral group in SO(3)

Are the Weyl modules projectives?

Quotient space of algebraic group

Applications of finite continued fractions

How to think about parabolic induction.

A ring of invariants in characteristic 2

Convergence of eigenvectors

Comparing Spectral Sequences

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