MeatAxe: rad - Radical Series

MeatAxe 2.4

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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].