Services & ResourcesWolfram ForumsMathGroup Archive

[Date Index] [Thread Index] [Author Index]

Re: commutativity

• To: mathgroup@smc.vnet.net
• Subject: [mg11604] Re: commutativity
• From: Clemens Frey <Clemens.Frey@uni-bayreuth.de>
• Date: Tue, 17 Mar 1998 10:43:39 -0500
• Organization: uni-bayreuth.de
• References: <6ek4j9$jag@smc.vnet.net>

John Albert Horst wrote:
> 
> I would like to be able to define a rule called, say, commutativeOff
> that would work as follows:
> 
> In[1] := a*b == b*a/.commutativeOff
> 
> Out[1] := False
> 
> As it is,
> 
> In[1] := a*b == b*a
> 
> Out[1] := True
> 
> How can I do this?

Hi everyone,
I just can give a hint:
You could define a function in terms of Times that does not have the
attribute "Orderless" that Times has. (to see this, use the
Attribute-function...)

Bye
Clemens