I have seen that a sphere can be covered with 6 parametrisations, but is it possible to totally cover a sphere with less parametrisations/charts?
2026-03-31 03:26:55.1774927615
How many parametrisations are needed to cover a sphere?
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The least you can do is 2 parametrizations. One such way of doing this is by the stereographic projection, in which a pole of the sphere is removed, and then the rest of the sphere is projected to the plane. Then the same is done by removing the opposite pole.