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MathGroup Archive 2006

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Re: Plus Behavior Inside a Notation Box?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg64896] Re: Plus Behavior Inside a Notation Box?
  • From: Paul Abbott <paul at physics.uwa.edu.au>
  • Date: Tue, 7 Mar 2006 06:11:46 -0500 (EST)
  • Organization: The University of Western Australia
  • References: <duh39s$5ui$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In article <duh39s$5ui$1 at smc.vnet.net>, "Josh" <josh at gocougs.wsu.edu> 
wrote:

> I was trying to set up some aliases using the Notation package and
> noticed some odd behavior when Plus[] is included in the right hand
> side.  I distilled it down to the following, and I'm hoping someone can
> shed some light on this.  The command I set up is:
> 
> Notation[a <=> Plus[b,c] ]

Add a second notation (using the Notation palette)

  Notation[a + n__ <=> Plus[b,c,n__] ]

> With the following behavior:
> 
> In[1]:=     b + c
> Out[1]=   a
> 
> In[2]:=     b + c + 1
> Out[2]=   1+b+c
> 
> In[3]:=     b + c + 0
> Out[3]=   a
> 
> Case 1 and 3 work as expected, but case 2 is not.  Any ideas?  

The second notation handles case 2.

> The goal is to set up aliases for Bessel and Hankel functions in some EM 
> work, and it was working very nicely until I hit this 'minor' roadblock.

I'd be interested to know how the Bessel and Hankel functions require 
such transformations and how you will use the Notations package to 
handle them.

Cheers,
Paul

_______________________________________________________________________
Paul Abbott                                      Phone:  61 8 6488 2734
School of Physics, M013                            Fax: +61 8 6488 1014
The University of Western Australia         (CRICOS Provider No 00126G)    
AUSTRALIA                               http://physics.uwa.edu.au/~paul


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