Demazure operator

Description research of Wilberd van der Kallen

The main interest of van der Kallen is in representations of reductive algebraic groups like the group of n by n matrices of determinant one. An important tool in his work has been the method of Frobenius splittings from algebraic geometry. Van der Kallen has uncovered connections between invariant theory, a topic from the nineteenth century, and the homological algebra of the representations of reductive algebraic groups.