RE: Simplifying constants

*To*: mathgroup at smc.vnet.net*Subject*: [mg18523] RE: [mg18489] Simplifying constants*From*: "Ersek, Ted R" <ErsekTR at navair.navy.mil>*Date*: Thu, 8 Jul 1999 22:32:56 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Morten G. Dyndgaard wrote: ----------------------------- I am working with some annoyingly long equations that I want to simplify by including one set of parameters in a constant (or function) A, and another in B and so on. You can easily do: A = b+c+d+e but what I want to do is the reverse: b+c+d+e = A ----------------------------- This should help. In[1]:= expr=a+b+b1+c+c1+d+d1+e; In[2]:= expr/.a+b+c+d+e->A Out[2]= A+b1+c1+d1 Regards, Ted Ersek