|   | 1 |  initial version  | 
Reduction is performed via rewriting system - like:
R = D4.rewriting_system()
R.reduce(s^2)
|   | 2 |  No.2 Revision  | 
Reduction is here can be performed via rewriting system - like:
R = D4.rewriting_system()
R.reduce(s^2)
 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.
 
                
                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.