Let P(z) be the werierstrass elliptic function with periods w1 and w2. How to estimate the partial derivative of |P'(z)| with respect to x? where z=x+iy.
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Recall that the magnitude of a complex vector is |z| = SQRT(x^2 + y^2) and d|z|/dx = x/SQRT(x^2 + y^2).
Now consider z being a function of a complex variable.
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