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12/10/12 7:07pm

I have a function which depends say upon two variables: f(x,y).

I need to find numerically the solution line y(x) of the equation f(x,y) = 0. The function itself for arbitrary set of {x,y} may evaluate to some complex number (it involves lots of square roots) but for the solution I am seeking the imaginary part on the solution line should be zero. I understand that one in principal can scan through the whole region of {x,y} to get the curve but I need numerically efficient way to write the code.


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