2.4 Three dimensional Surfaces
In the subroutines that solve Laplace problems
in three dimensions (
the boundaries must
be represented in the form of a set of planar triangles.
In order that the normal to the boundary points outward rather
than inward the three nodes that define each element must
be listed in the anti-clockwise direction when it
is viewed from just outside the surface.
each solve Laplace
problems in which the boundary under consideration is that of
a sphere of unit radius.
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