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Re: GroebnerBasis never finishes

  • To: mathgroup at smc.vnet.net
  • Subject: [mg95140] Re: GroebnerBasis never finishes
  • From: dh <dh at metrohm.com>
  • Date: Wed, 7 Jan 2009 04:15:10 -0500 (EST)
  • References: <gjv794$p4h$1@smc.vnet.net>


Hi Andrew,

in V7 it executes very fast (50mSec). Could it be that one of your 

variables or parameters already had some value? Try again with a fresh 

Kernel.

Daniel



AndrewTamra wrote:

> Following groebner basis took more than an hour and did not complete. I had to abort it. Any ideas? Thanks.

> 

> GroebnerBasis[

> {

> 2401*t1*t3 + 2401*t2*t3 - 2401*t3^2 - 245*t1*v2 - 245*t2*v2 + 490*t3*v2 - 25*v2^2,

> 4802*t1*t3 - 2401*t3^2 - 490*t1*v2 + 490*t3*v2 - 25*v2^2,

> -49*t*t3 + 49*t1*t3 + 5*t*v2 - 5*t1*v2,

> 10*H - 49*t3^2 - 49*t4^2 + 98*t4*t5 - 49*t5^2 - 10*t4*v2 + 10*t5*v2 - 10*w1,

> -10*H - 49*t3^2 - 49*t4^2 + 98*t4*t6 - 49*t6^2 + 10*t3*v2 - 10*t4*v2 + 10*t6*v2 - 10*w2

> },

> {t1,t2,t3,t4,t5,t6,v2,w1,w2,H},

> MonomialOrder -> Lexicographic]

> 




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