>>18980635 /LB

>https://twitter.com/OKeefeMedia/status/1667341133951930374?s=20

Did ancient mathematicians know Euler's characteristic for convex polyhedra?

The formula V−E+F=2 is so simple that I can't believe that it was really Euler (or perhaps Descartes) who first observed it (I mean the formula itself in some generality, not necessarily a valid proof). To have a concrete question: Is there any reference to this formula in ancient mathematics?

https://mathoverflow.net/questions/154498/did-ancient-mathematicians-know-eulers-characteristic-for-convex-polyhedra