rad - Radical Series

Command Line

rad Options [-l MaxLength] [-H Num] Module 

Options

Standard options, see Standard Command Line Options

-l MaxLength

Maximum number of layers to compute.

-H Num

Calculate generators for the Num-th head.

Module

Module name.

Input Files

Name.cfinfo

Constituent information.

NameCf.std.1, NameCf.std.2, ...

Generators on the irreducible constituents.

Output Files

Name.cfinfo

Radical information.

NameCf.hX

Generators for the X-th head.

Description

This program calculates the radical series of an arbitrary module Name, or the homomorphisms from the projective modules corresponding to the composition factors of the given module to the module.

Implementation Details

The program uses an algorithm by Magdolna Szöke, see [Sz98].