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| 2013-02-25 16:53:34 +0200 | commented answer | doubly indexed variables in a non-commutative ring Thanks, but this makes a polynomial ring in a commuting list of variables. Do you know a way to make them not commute? |
| 2013-02-25 16:52:47 +0200 | commented answer | doubly indexed variables in a non-commutative ring Ok, so I can make this list of variables, but how do I make it the *non-commuting* variables over ZZ? I thought FreeAlgebra would do this, but it seems to make a FreeAlgebra in the commuting list of variables I give it. |
| 2013-02-20 12:44:19 +0200 | asked a question | doubly indexed variables in a non-commutative ring I'm trying to do some basic arithmetic in a non-commutative polynomial ring with variables indexed by two indices i and j (say 1 \le i < j \le 6). Does anyone know how to ask for a doubly indexed variable like this? |
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.