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Re: unexpected Simplify[] ouput

• To: mathgroup at smc.vnet.net
• Subject: [mg24259] Re: [mg24240] unexpected Simplify[] ouput
• From: BobHanlon at aol.com
• Date: Wed, 5 Jul 2000 23:10:40 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

In a message dated 7/4/2000 3:38:57 PM, gorni at dimi.uniud.it writes:

>With Mathematica 4:
>
>7(-1 + a) (1 + a) // FullSimplify    gives  7(-1  + a^2)
>
>8(-1 + a) (1 + a) // FullSimplify    gives  8(-1 + a) (1 + a)

SetOptions[Simplify, ComplexityFunction -> LeafCount ];

7(-1 + a) (1 + a) // Simplify

7*(-1 + a^2)

8(-1 + a) (1 + a) // Simplify

8*(-1 + a^2)

b(-1 + a) (1 + a) // Expand // Simplify

(-1 + a^2)*b

SetOptions[Simplify, ComplexityFunction -> Automatic ];


Bob Hanlon