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The 45 diffraction equation differs from the 15 equation
by the inclusion of a -derivative.
Luckily this derivative fits on the six-point differencing star

So other than modifying the six coefficients on the star,
it adds nothing to the computational cost.

** Next:** Difficulty in higher dimensions
** Up:** FINITE DIFFERENCING
** Previous:** Solving tridiagonal simultaneous equations
Stanford Exploration Project

10/31/1997