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SIMPLIFY: Results seem to depend on the form of the expression
 To: mathgroup at smc.vnet.net
 Subject: [mg26236] SIMPLIFY: Results seem to depend on the form of the expression
 From: Blimbaum Jerry DLPC <BlimbaumJE at ncsc.navy.mil>
 Date: Wed, 6 Dec 2000 02:16:21 0500 (EST)
 Sender: ownerwrimathgroup at wolfram.com
To try to understand Mathematica better, sometimes I try some simple
things to see what happens etc...Here are some things I tried with Simplify
with the results depending on the form of the original expression even
though they are just simple polynomial expressions...
(1) a x + b x == c y+d y+g x+f x//Simplify
returns
(a+b) x == f x +g x +(c+d) y (* incomplete *)
(2) a x + b x  c y  d y == g x + f x//Simplify
returns
(a+b) x == (f+g) x + (c+d) y (* seems to work *)
(3) a x + b x  g x f x == c y + d y//Simplify
returns
(a+bfg) x == (c+d) y (* seems to work *)
(4) a x + b x  c y  d y  g x  f x == 0//Simplify
returns
(a+b) x == f x + g x +(c+d) y (* incomplete *)
(5) a x + b x c y  d y  g x  f x//Simplify
doesnt do anything to the expression..
Should Simplify be this temperamental? (FullSimplify handles all
these cases which is what I would have expected even from Simplify since
these are just simple polynomial expressions).
thanks...Jerry Blimbaum NSWC Panama City, Fl
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