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Substitution

• To: mathgroup at smc.vnet.net
• Subject: [mg46800] Substitution
• From: DrBob <drbob at bigfoot.com>
• Date: Tue, 9 Mar 2004 04:30:43 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

HoldTemporary may do the trick for you.

http://library.wolfram.com/infocenter/MathSource/705/

Hold or HoldForm might also do it:

p = a*x + b*x;
p + HoldForm[Subscript[p, D]]

Bobby

From: Bruce W. Colletti (bcolletti at compuserve.com)
To: mathgroup at smc.vnet.net
Subject: [mg46800] Substitution

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How to make the variable Subscript[p,D] wholly unrelated to variable p?

For instance, the notebook...

p = a x + b x;
p + Subscript[p,D]

...produces a x + b x + Subscript[ax+bx,D].

But I want p + Subscript[p,D] and thereafter, to freely use
Subscript[p,D] without it being affected by the p-value.  Symbolizing
Subscript[p,D] didn't work.

Thankx.

Bruce