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Showing 1 to 2 of 2 for “"Algebraische Gruppen"”.
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Einbettungsprobleme in der Differentialgaloistheorie
… von endlichen auf lineare algebraische Gruppen. Dies erlaubt die Zerlegung eines Einbettungsproblems in ein zerfallendes und ein Frattini-Einbettungsproblem wie in der gewoehnlichen Galoistheorie. Als Hauptresultat fuer zusammenhaengende Einbettungsprobleme erhalten wir: --- …
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Difference equations with semisimple Galois groups in positive characteristic
Let F be a field with an automorphism sigma on F. A (linear) difference equation over F is an equation of the form sigma(y)=Ay with A in GL_n(F) and y a vector consisting of n indeterminates. There is the notion of a Picard-Vessiot ring which is in some sense a "smallest" difference ring extension …