Singular Manual: ncdecomp_lib

> | ### 7.5.11 ncdecomp_lib Library: ncdecomp.lib Purpose: Decomposition of a module into its central characters Authors: Viktor Levandovskyy, levandov@mathematik.uni-kl.de. Overview: This library presents algorithms for the central character decomposition of a module, i.e. a decomposition into generalized weight modules with respect to the center. Based on ideas of O. Khomenko and V. Levandovskyy (see the article [L2] in the References for details). Procedures:
> 7.5.11.0. CentralQuot |  | central quotient M:G,
> 7.5.11.0. CentralSaturation |  | central saturation ((M:T):...):T) ( = M:T^infinity),
> 7.5.11.0. CenCharDec |  | decomposition of I into central characters w.r.t. C
> 7.5.11.0. IntersectWithSub |  | intersection of M with the subalgebra, generated by pairwise commutative elements of Z.

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