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7.7.16.0. purityTriang
Procedure from library purityfiltration.lib (see purityfiltration_lib).

Usage:
purityTriang(S), S matrix with entries of an Auslander regular ring D

Return:
a matrix T

Purpose:
compute a triangular block matrix T, such that M=D^p/D^q(S^t) is isomorphic to M'=D^p'/D^q(T^t)

Example:
 


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