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Re: Replacement?


in message <9304260436.AA28649 at yoda.physics.unc.edu> francis at osiris.ucsd.edu
writes
 
> I simply want Mma to replace N q with Q everywhere mathematically
> possible, so that N^2 q^2 would be replaced by Q^2,
> N^3 q^2 by N Q^2 and so on.
 
Handing on Arthur L. Rubin's (a_rubin at dsg4.dse.beckman.com) answer to an
analogous
question posted on news.sci.math.symbolic a couple of weeks ago:
 
alr: In general, you might try using the AlgebraicRules reductions, remembering
alr: to include all variables in the reduction;
alr:
alr: R = AlgebraicRules[N q == Q,{N, q,...}]
 
thus:
 
In[1]:= N^2 q^2 /. R
Out[1]= Q^2
 
In[2]:= N^5 q^3 /. R
Out[2]= N^2 Q^3
 
 
Roland Jakschewitz
 
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