Universality conjecture for the 34 listed ternary lattices
Universality conjecture for the 34 listed ternary lattices
Consider the ternary lattices listed in the theorem immediately preceding the conjecture, over the relevant real quadratic fields. A universal ternary lattice is a ternary quadratic lattice representing every totally positive element of the ring of integers. Universality conjecture. All the ternary lattices listed in the above theorem are indeed universal. The source gives computational verification of representability bounds for these lattices, but a proof of universality for all lattices remains open.
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Sources & referencesView supporting material
Primary source
Vitezslav Kala, Jakub Krásenský, Dayoon Park, Pavlo Yatsyna and Błażej Żmija, “Kitaoka's Conjecture for quadratic fields”, arXiv:2501.19371 (2025).
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