The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Inactive » comp.soft-sys.math.mathematica

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: SymmetricReduction strange behaviour
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
Francisco Javier

Posts: 12
Registered: 5/29/08
SymmetricReduction strange behaviour
Posted: Mar 5, 2013 4:15 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Can anybody reproduce this error? I mean, expr is symmetric with respect to
a, b, c, then the second component should be zero in both cases. Am I wrong?

expr = (a - b) (b - c) (c - a);
SymmetricReduction[expr, {a, b, c}]
SymmetricReduction[expr^2, {a, b, c}]

{3 a b c - (a + b + c) (a b + a c + b c), 2 a b^2 + 2 a^2 c + 2 b c^2}
The second component should be zero!

{-27 a^2 b^2 c^2 - 4 a b c (a + b + c)^3 + 18 a b c (a + b + c) (a b + a
c + b c) + (a + b + c)^2 (a b + a c +
b c)^2 - 4 (a b + a c + b c)^3, 0}

Francisco Javier Garc=EDa Capit=E1n

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.