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Topic: more factoring for mice and elephants
Replies: 3   Last Post: Jan 15, 2012 4:11 PM

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Registered: 4/26/08
more factoring for mice and elephants
Posted: Jan 14, 2012 5:19 PM
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I suppose this quadrivariate polynomial doesn't factor over Q, but
Derive 6.10 fails to notice this fact in acceptable time:

16*a^3*d^3 - 48*a^2*b*c*d^2 + 27*a^2*c^4 - 6*a*b^2*c^2*d
+ 27*b^4*d^2 - 16*b^3*c^3


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