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Milne Thompson Method for finding Analytic Function : ウィキペディア英語版
Milne Thompson Method for finding Analytic Function

Milne Thompson Method is a method of finding an Analytic Function, whose real or imaginary part is given. The method greatly simplifies the process of finding the Analytic Function, whose real or imaginary or any combination of the two parts is given.
==Method for finding the Analytic Function==
Let f(z) = u(x,y) + iv(x,y) be any Analytic Function.
Let z = x + iy and \bar \ = x - iy
Hence,
x = \frac}\
Therefore, f(z) = u(x,y) + iv(x,y) is equal to
f(z) = u( \frac}\ ) + iv( \frac}\ )
This can be regarded as an identity in two independent variables z and \bar \ . We can therefore, put z = \bar \ and get
f(z) = u(z,0) + iv(z,0)
So, f(z) can be obtained in terms of z simply by putting x = z and y = 0 in f(z) = u(x,y) + iv(x,y) when f(z) is Analytic Function.
Now, f'(z) = + i .
Since, f(z) is Analytic, hence Cauchy-Riemann Equations are satisfied. Hence, f'(z) = - i .
Let = \Phi(x,y) and = \Psi(x,y).
Then,
f'(z) = - i
f'(z) = \Phi(x,y) - i\Psi(x,y)
Now, putting x = z and y = 0 in the above equation, we get
f'(z) = \Phi(z,0) - i\Psi(z,0).
Integrating the above equation we get \int f'(z)\,dz = \int \Phi(z,0) dz - i \int \Psi(z,0) dz
Or
f(z) = \int f'(z)\,dz = \int \Phi(z,0) dz - i \int \Psi(z,0) dz + c
which is the required Analytic Function.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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