D.6.4 stratify_lib
------------------
Library:
stratify.lib
Purpose:
   Algorithmic Stratification for Unipotent Group-Actions
Author:
Anne Fruehbis-Krueger, anne@mathematik.uni-kl.de

Overview:
This library provides an implementation of the algorithm
of Greuel and Pfister introduced in the article <Geometric
quotients of unipotent group actions>.


Procedures:
* prepMat:: list of submatrices corresp. to given filtration
* stratify:: algorithmic stratification (main procedure)

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