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math.AC2010
On the finite inverse problem in iterative differential Galois theory
Andreas Maurischat
In positive characteristic, nearly all Picard-Vessiot extensions are inseparable over some intermediate iterative differential extensions. In the Galois correspondence, these inter…
math.AC2010★ 5 cited
On the finite generation of additive group invariants in positive characteristic
Emilie Dufresne, Andreas Maurischat
Roberts, Freudenburg, and Daigle and Freudenburg have given the smallest counterexamples to Hilbert's fourteenth problem as rings of invariants of algebraic groups. Each is of an a…