Date: Sep 11, 2013 11:28 AM
Author: mervynmccrabbe@gmail.com
Subject: Building an Equation to find (Maximum Y) ie Highest Point on a curve!
x^4 + y^4 + A(x^2) - A(y^2) + 2(x^2)(y^2) - Bxy + C = 0

If I have correctly evaluated

dy/dx to be = [4(x^3) + 2Ax + 4x(y^2) - By]

and if it is proper to set this then equal to zero

to give a new equation that could be merged with the original to get rid

of the cumbersome XY terms - then that i failed to do.

I've tried completing squares etc but can not get rid of composite XY terms.

If I could eliminate X and get a generalised Y-Only equation

then I could manage the rest.

Any help would be appreciated

Mervyn Mc Crabbe