Gröbner Deformations of Hypergeometric Differential Equations

In recent years, new algorithms for dealing with rings of differential operators have been discovered and implemented. A main tool is the theory of Gr�bner bases, which is reexamined here from the point of view of geometric deformations. Perturbation techniques have a long tradition in analysis; Gr�bner deformations of left ideals in the Weyl algebra are the algebraic analogue to classical perturbation techniques.