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Poisson Solver (in transformed coordinates)


Can anyone point me to a good Poisson Solver for a 2D region with a
non-rectangular grid, or after transforming the coordinates, a nonhomogenous
elliptical solver (would contain mixed and lower order derivatives in the
PDE).  Actually all I am trying to do is calculate and plot streamlines from
a velocity field but this seemed like the way I should go.

L. Wibberly




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