Ralf Stephan on Sun, 20 Jun 2004 19:06:49 +0200


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subst? 

I am not sure if I understand what Bill writes about the new 
behaviour of subst. The version is 2.2.8 from June 3.
 
? subst(x^3+1,x+1,x-1)
%3 = x^3 - 6*x^2 + 12*x - 7
? subst(x^3+y^3,x+y,x-y)
%4 = x^3 - 6*y*x^2 + 12*y^2*x - 7*y^3
 
Is this supposed to work?
 
Regards,
ralf