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Re: Implicit Times

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  • Subject: [mg128637] Re: Implicit Times
  • From: "Dave Snead" <dsnead6 at>
  • Date: Sun, 11 Nov 2012 15:54:31 -0500 (EST)
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Thanks, but the issue is not defining the operator.
The issue is Mathematica's implicit assumption of a Times (*) when there's a 
space between variables.
The NonCommutativeMultiply (**) already exists.

So when I input
x y//FullForm
I want Mathematica to return
instead of

Of course I want the explicit Times (*) to
still work the same as before,

--Dave Snead

-----Original Message----- 
From: James Stein
Sent: Friday, November 09, 2012 11:06 PM
To: mathgroup at
Subject: [mg128637] Re: Implicit Times

Read this Mathematica reference on "operators without built-in meanings".
I assume you could define, e.g., 'CircleTimes' to return whatever function
(including non-commutative multiply) you wish.

On Thu, Nov 8, 2012 at 4:00 PM, Dave Snead <dsnead6 at> wrote:

> Hi all,
> Mathematica assumes Times (*) when two expressions are
> juxtaposed with no explicit intervening binary operator
> (ex., x y is interpreted as x*y).
> I want to change this behavior so it assumes a
> NonCommutativeMultiply (**) instead.
> Is this possible?
> Thanks in advance,
> Dave Snead

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