Category
page 1Geometry problems
Kepler conjecture
mathematical theorem about sphere packing
Hilbert's third problem
one of twenty-three, asking whether one polyhedra can be cut and reassembled into another
Hilbert's fourth problem
one of twenty-three, asking to construct all metric spaces where lines resemble those on a sphere
Hilbert's eighteenth problem
On lattices and sphere packing in Euclidean space