Following is the poly32 model,
equation(x,y) = p00 + p10*x + p01*y + p20*x^2 + p11*x*y + p02*y^2 + p30*x^3 +
p21*x^2*y + p12*x*y^2
In the above equation i dont want p12*x*y^2 during my curve fitting(i.e. p12 should be zero). How can i achieve it?
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