Conjecture on dense colorings for typical norms
Conjecture on dense colorings for typical norms
For a norm on , write for the chromatic number of its unit-distance graph, and let denote the least number of color classes in a proper coloring whose classes are dense in . A norm is called typical if it belongs to the Baire-category typical set in the space of norms.
Typical-norm dense-coloring conjecture. For a typical norm,
For typical norms, the equality is known, but the coloring establishing it is nonconstructive. The conjecture asserts that requiring every color class to be dense does not increase the chromatic number.
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Sources & referencesView supporting material
Primary source
Maxim Didin and Vsevolod Voronov, “The chromatic number of Euclidean space with dense color classes”, arXiv:2607.19946 (2026).
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