solution of system of quadratic eqns.



On 6/23/2012 2:33 PM, Krishna Myneni wrote:
>
>
> Hmm... Am I applying the fix incorrectly? The redefinition of 
> resultant fixes the test case, given above, but solve() still doesn't 
> work for me.:

I am puzzled by this -- I tried it and resultant didn't work when called 
from solve.

Tracing resultand and ratsimp shows this.
....


" Enter "resultant[8*y^2+sqrt(7)-4,8*y^2-8*y-sqrt(7)-2,y]
  .1" Enter "ratsimp[256*(sqrt(7)^2-7)]
  .1" Exit  "ratsimp256*sqrt(7)^2-1792


    ??????   256*7  is indeed 1792  but ...

RJF