Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Generalized loewy decomposition of D-modules

: Grigoriev, D.; Schwarz, F.

Kauers, M. ; Association for Computing Machinery -ACM-:
ISSAC 2005, International Symposium on Symbolic and Algebraic Computation. Proceedings. CD-ROM : July 24 - 27, Beijing, China
New York: ACM, 2005
ISBN: 1-595-93191-0
International Symposium on Symbolic and Algebraic Computation (ISSAC) <30, 2005, Beijing>
Fraunhofer SCAI ()
partial differential equation; D-module; Computer-Algebra

Starting from the well-known factorization of linear ordinary differential equations, we define the generalized Loewy decomposition for a ${\\cal D}$-module. To this end, for any module $I$, overmodules $J\\supseteq I$ are constructed. They subsume the conventional factorization as special cases.
Furthermore, the new concept of the module of relative syzygies $Syz(I,J)$ is introduced. The invariance of this module and its solution space w.r.t. the set of generators is shown. We design an algorithm which constructs the Loewy-decomposition for finite-dimensional and some kinds of general ${\\cal D}$-modules. These results are applied for solving various second-and third-order linear partial differential equations.