Newton iteration is not converging

Question:Newton iteration is not converging

Posted: wo0olf 20 Product: Maple

August 07 2014

what is problem ?

pde := u(x, y)*(diff(u(x, y), x)) = .108/(x^2/(0.625e-1)+0.25e-4)^2-609224*10^(-7)/(x^2/(0.625e-1)+0.25e-4)^3+(diff(u(x, y), y, y))*10^(-6)

u(x, y)*(diff(u(x, y), x)) = .108/(16.00000000*x^2+0.25e-4)^2-(76153/1250000)/(16.00000000*x^2+0.25e-4)^3+(1/1000000)*(diff(diff(u(x, y), y), y))

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