One of the most basic facts of the theory of surfaces is $$ \chi = 2-2g $$ where $$ \chi \triangleq V - E + F $$ for orientables surfaces.
Does this result have a name?
I am also after a proof or a reference to one.
2026-03-26 16:26:27.1774542387
theorem relating the genus of a surface to the Euler characteristic
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