[Haskell-cafe] Abstraction in data types
ajs at 2piix.com
Thu Mar 18 01:20:02 EDT 2010
On Mar 17, 2010, at 9:56 PM, Alexander Solla wrote:
> But your "spherical" points don't really form a basis in three-
> space, or even over all of two-space.
I'll take this back. Lattitude and longitude is enough to "form a
basis" on R^2, by taking a basis for the surface of the sphere in
terms of latitude and longitude and projecting it stereographically.
So if you wanted to use the normalization idea, you could use the
stereographic projection formulas to turn a spherical point into a
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