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- Elements
- underlying surface
- χ
- soccer ball
- Euler formula
- Euler's formula
- Euler's theorem
- χ
- ''χ''
- ''χ''
- Euler Characteristic
- Euler characteristic for planar graphs
- Euler characteristic of a fiber bundle
- Euler characteristic#Polyhedra
- Euler no.
- Euler num
- Euler relation
- Euler's formula for planar graphs
- Euler's observation
- Euler's polyhedral formula
- Euler's polyhedron formula
- Euler's relation
- Euler-Poincaré invariant
- Euler–Poincaré characteristic
- Euler–Poincaré formula
- Euler–Poincaré theorem
- Euler’s formula
- Zero Euler characteristic
- Euler characteristic has a definition in terms of homology groups
- polyhedron formula
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