24 Feb
2009
24 Feb
'09
2:59 p.m.
On Tue, 24 Feb 2009 08:50:46 -0500, Jeremy Jay <dinkumator@gmail.com> said: JJ> Hmm I guess it makes sense in that regard, but it is certainly JJ> non-intuitive.
Please consider two expressions: ((x+2)^2).subs(4==A) and (x^2+4x+4).subs(4==A). What are "intuitive" answers? Thus even if you are not referring to "internal representation" this is the only way to make subs() mathematically correct. I think Alexei made his point absolutely correct. Best wishes, Vladimir -- Vladimir V. Kisil email: kisilv@maths.leeds.ac.uk -- www: http://maths.leeds.ac.uk/~kisilv/