Re: Eliminate
- To: mathgroup at smc.vnet.net
- Subject: [mg116170] Re: Eliminate
- From: Matthias Bode <lvsaba at hotmail.com>
- Date: Fri, 4 Feb 2011 01:37:50 -0500 (EST)
I'm afraid you can't, Francisco: In[1]:= MemberQ[{{x, y, z} == {(v + w)*(b^2*v^4 - a^2*v^3*w + 3*b^2*v^3*w + c^2*v^3*w - 3*a^2*v^2*w^2 + 3*b^2*v^2*w^2 + 3*c^2*v^2*w^2 - a^2*v*w^3 + b^2*v*w^3 + 3*c^2*v*w^3 + c^2*w^4), (-w)*((-b^2)*v^4 - 2*b^2*v^3*w - a^2*v*w^3 + b^2*v*w^3 + c^2*v*w^3 + c^2*w^4), (-v)*(b^2*v^4 - a^2*v^3*w + b^2*v^3*w + c^2*v^3*w - 2*c^2*v*w^3 - c^2*w^4)}}, t] Out[1]= False MATTHIAS BODE S 17.35775=B0, W 066.14577=B0 2'740 m AMSL. > Date: Thu, 3 Feb 2011 05:29:59 -0500 > From: garciacapitan at gmail.com > Subject: [mg116138] Eliminate > To: mathgroup at smc.vnet.net > > Dear friends, how can I eliminate t from the equations > > {x,y,z}=={(v + w) (b^2 v^4 - a^2 v^3 w + 3 b^2 v^3 w + c^2 v^3 w - 3 a^2 > v^2 w^2 + 3 b^2 v^2 w^2 + 3 c^2 v^2 w^2 - a^2 v w^3 + > b^2 v w^3 + 3 c^2 v w^3 + c^2 w^4), > -w (-b^2 v^4 - 2 b^2 v^3 w - a^2 v w^3 + b^2 v w^3 + c^2 v w^3 + c^2 w^4), > -v (b^2 v^4 - a^2 v^3 w + b^2 v^3 w + c^2 v^3 w - 2 c^2 v w^3 - c^2 w^4)} > > Many thanks > > -- > --- > Francisco Javier Garc==EDa Capit==E1n > http://garciacapitan.auna.com