e/Hilbert's fourth problem

Information
has gloss	eng: In mathematics, Hilbert's fourth problem in the 1900 Hilbert problems was a foundational question in geometry. In one statement derived from the original, it was to find geometries whose axioms are closest to those of Euclidean geometry if the ordering and incidence axioms are retained, the congruence axioms weakened, and the equivalent of the parallel postulate omitted. A solution was given by Georg Hamel.
lexicalization	eng: Hilbert's fourth problem
instance of	e/Hilbert's problems