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Results tagged with surfaces
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user 1703
A surface is a two-dimensional topological manifold. The term can also be used to describe a smooth surface, depending on the context.
5
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What is the quantity 2(handles)+crosscaps called?
I don't know of a name for the specific quantity $2g + k$, but it should be noted that $2 - (2g+k) = \chi(S_{g,k})$, the Euler characteristic.
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