Hadwiger–Nelson problem on the chromatic number of unit distance graphs in the Euclidean plane
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Hadwiger's theorem characterizing measure functions in Euclidean spaces
Goldbach's conjecture | ''n''! conjecture | n! conjecture | Kato's conjecture | Calabi conjecture | Weil conjecture | ''Uncle Petros and Goldbach's Conjecture'' by Apostolos Doxiadis | Uncle Petros and Goldbach's Conjecture | Schanuel's conjecture | Pollock's conjecture | Mumford conjecture | Kepler conjecture | Heawood conjecture | Hadwiger's theorem | Hadwiger–Nelson problem | Chang's conjecture | Catalan's conjecture | Blattner's conjecture | Beal's conjecture |