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Re: Suggestions on how to use standard engineering symbols in Mathematica which conflict with Mathematica own symbols?

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  • Subject: [mg104106] Re: Suggestions on how to use standard engineering symbols in Mathematica which conflict with Mathematica own symbols?
  • From: John Fultz <jfultz at wolfram.com>
  • Date: Mon, 19 Oct 2009 07:13:15 -0400 (EDT)
  • Reply-to: jfultz at wolfram.com

You could use Interpretation[] to create an object which looks like one thing 
but evaluates as another.  You can also add formatting rules to change the 
default output to produce an InterpretationBox[] object...something like this:

In[1]:= MakeBoxes[Inertia, StandardForm]:=InterpretationBox[I, Inertia];

In[2]:= Inertia

Out[2]= I

This completely prevents a conflict with the built-in symbols, since you can
still type in an I and have it mean what you want it to mean.  If you wanted to 
use such an object for input, you can copy/paste it from output, or put it into 
a palette button.

-John


On Sun, 18 Oct 2009 05:26:29 -0400 (EDT), Nasser M. Abbasi wrote:
> Hello
>
> This is a problem I am sure all of us had.
>
> It would be nice to use the same standard engineering/physics
> symbols/letters found in textbook to write the equations in mathematica.
>
> But some/many of those symbols conflict with existing Mathemtica symbols.
> For example, Young modulus is always written as E, but E in mathematica is
> reserved to the exponential constant, and I would like to use I (upper
> case
> I) to mean the moment of inertia, and not have it conflict with complex
> number I. And many other examples.
>
> I was wondering if there is a way to still use these letters in my
> equations but not conflict with Mathematica's?
>
> I thought may be I could make a bold versions of these letters with a new
> code, or find latine characters which "looks like" these from the palette,
> but have different ASCII code.
>
> Or may be I could tell mathematica somehow to "undefine" these symbols
> during some computation and restore them again, so it will not interpret
> them as its own standard symbols only during this computation, but was
> not sure if this is a good idea? (would this will cause a problem
> internally to Mathematica as it could very well use these symbols in its
> own package code. I could always use Exp[] instead of E and use Sqrt[-1]
> instead of "I" when I really mean to use the Mathematica letters and
> leave E and I etc... for my use.
>
> Any other ideas others have on this subject? I'd really like to write the
> equations as they appear in the textbook if possible and not have to
> rename standard engineering letters to something else.
>
> --Nasser





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