|   | 1 |  initial version  | 
Potential alternatives: - Install pandas in your Sage installation, and use a pandas DataFrame (https://fr.wikipedia.org/wiki/Pandas) - Define a FreeModule indexed by pairs of partitions
|   | 2 |  No.2 Revision  | 
Potential alternatives:
 - alternatives:
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                Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.