Re: commuting and non-commuting symbols
- To: mathgroup at smc.vnet.net
- Subject: [mg31420] Re: [mg31361] commuting and non-commuting symbols
- From: Rolf Mertig <rolf at mertig.com>
- Date: Sat, 3 Nov 2001 05:29:30 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hi, check out FeynCalc. See, e.g.: http://www.feyncalc.org/DotSimplify/ http://www.feyncalc.org/DeclareNonCommutative/ You may need to write your own noncummative matrix multiplication function though. In FeynCalc "." is used as noncommutative multiplication operator, not as matrix operator. Rolf Mertig P.s.: If you need speed, use FORM. It is much faster than FeynCalc/Mathematica for noncommutative polynomial manipulation. But it is a bit more cumbersome to use and program. See http://www.nikhef.nl/~form/ -- Mertig Consulting Berlin http://www.mertig.com