-homologie et -homologie dans la catégorie des -modules différentiables
Gauge-equivalent deformations of linear ordinary differential operators with constant coefficients.
Generalized Koszul complexes and Hochschild (co-)homology of complete intersections.
Generators for the Derivation modules and the relation ideals of certain curves.
Generators of rings of constants of derivations.
Géométrie des points épais
Gröbner δ-bases and Gröbner bases for differential operators
This paper deals with the notion of Gröbner δ-base for some rings of linear differential operators by adapting the works of W. Trinks, A. Assi, M. Insa and F. Pauer. We compare this notion with the one of Gröbner base for such rings. As an application we give some results on finiteness and on flatness of finitely generated left modules over these rings.
Growth orders occurring in expansions of Hardy-field solutions of algebraic differential equations
Growth orders occurring in expansions of Hardy-field solutions of algebraic differential equations
We consider the asymptotic growth of Hardy-field solutions of algebraic differential equations, e.g. solutions with no oscillatory component, and prove that no ‘sub-term’ occurring in a nested expansion of such can tend to zero more rapidly than a fixed rate depending on the order of the differential equation. We also consider series expansions. An example of the results obtained may be stated as follows.Let be an element of a Hardy field which has an asymptotic series expansion in , and ,...