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Re: Problem Replacing part of NonCommutativeMultiply expresions

• To: mathgroup at smc.vnet.net
• Subject: [mg104539] Re: Problem Replacing part of NonCommutativeMultiply expresions
• From: mathman <mstankus at gmail.com>
• Date: Tue, 3 Nov 2009 02:56:05 -0500 (EST)
• References: <hcl3s1$bvc$1@smc.vnet.net>

Use Fullform to see what is going on.

The following should work:

g**a**p**r**e**r**e/.NonCommutativeMultiply[a___,r,e,r,e,b___]->0]

On Nov 1, 3:59 pm, Iv=E1n Lazaro <gamins... at gmail.com> wrote:
> Dear all,
>
> I'm working with a huge amount (2000) of terms of this tipe:
> g**a**p**r**e**r**e
>
> But a lot of them are cero. The problem is that i'm not able to set
> r**e**r**e->0 in such expresions. If I do g**a**p**r**e**r**e/.r**e**r**e->0
> nothing happens.
>
> Do you have some idea?
>
> Thanks a lot!