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3.9.13 Ext Modules

Supported CoCoA Package
TITLE       : ext.cpkg
DESCRIPTION : CoCoA package for computing Ext modules, depth, and presentation
AUTHOR      : A. Damiano
 
LOADING INSTRUCTIONS
-- Enter 
       $contrib/ext.Man();
   to get a complete description of the package including a suggested alias.
-- Enter 
       $contrib/ext.About();
   to find the version number.  You may want to check the CoCoA
   homepage for the latest version.