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math.AC2022
Normal Forms in Differential Galois Theory for the Classical Groups
Daniel Robertz, Matthias Seiss
Let be a classical group of dimension and let be differential indeterminates over a differential field of characteristic zero with alge…
math.AC2020
Singularities of Algebraic Differential Equations
Markus Lange-Hegermann, Daniel Robertz, Werner M. Seiler +1
There exists a well established differential topological theory of singularities of ordinary differential equations. It has mainly studied scalar equations of low order. We propose…