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For questions related to teaching mathematics. For questions in Mathematics Education as a scientific discipline there is also the tag mathematics-education. Note you may also ask your question on http://matheducators.stackexchange.com/.

1 vote

What (fun) results in graph theory should undergraduates learn?

Another interesting consequence of Euler's formula $V-E+F=2$ might include a proof that there are exactly five Platonic solids. Given that there are regular polygons with any number of sides, it ofte …
3 votes

What (fun) results in graph theory should undergraduates learn?

The fact that every planar graph is 4-colorable is certainly beyond the scope of an introductory course, but showing that every planar graph is 5-colorable is certainly doable.