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How can I get better solution for this...?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg120023] How can I get better solution for this...?
  • From: sid <siddys at gmail.com>
  • Date: Wed, 6 Jul 2011 05:39:55 -0400 (EDT)

Hi all,
    I am trying to solve the following for {sx,sy,gx,gy}

     sx^2 (1 + gx gy)^2 + sx^2 gy^2 = P00 ........(1)
     sx sy gx (1 + gx gy) + sx sy gy = P01 .......(2)
     sy^2 ( 1 + gx^2) = P11 ...............................(3)
     sx sy  = D ................................................(4)

in terms of P00,P01,P11, and D.

When I use Solve[] , I get a huge output containing the P terms up
till the order of 16 (i.e P00^16 etc..), which
I know is not correct. I do not think I am specifying the problem
correctly, and being a non-expert in Mathematica, would appreciate
some help. Specifically
1) should I specify the simultaneous equation using && operator? I
have tried it, and I get different (but huge) output
2) can I break the problem into parts? how?
Thanks,
s.


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