Unimodality conjecture for coefficients of constructed polynomial Pythagorean triples

A polynomial solution (A,B,C)(\mathcal{A},\mathcal{B},\mathcal{C}) is constructed for each standard Pythagorean triple, where A\mathcal{A}, B\mathcal{B}, and C\mathcal{C} are polynomials in qq. A sequence of real numbers is unimodal if it increases, not necessarily strictly, to a maximum and then decreases monotonically. Unimodality conjecture. The sequences of coefficients of the polynomials A\mathcal{A}, B\mathcal{B}, and C\mathcal{C} constructed in this article are unimodal. The authors cannot guarantee this additional property; unimodality is generally difficult to prove. The analogous property for qq-deformed rational numbers was conjectured previously and proved in the cited work.

Sources & referencesView supporting material

Primary source

Hugo Mathevet, Sophie Morier-Genoud and Valentin Ovsienko, “Quantizing Pythagorean triples”, arXiv:2602.20536 (2026).

Additional references

32 papers in this index state this conjecture (2002–2026). The statement above is taken from the most recent of them; the others are arXiv:2507.15006, arXiv:2506.08883, arXiv:2505.09821, arXiv:2502.02974, arXiv:2412.19593, arXiv:2406.14439, arXiv:2310.14368, arXiv:2305.15802, arXiv:2203.00405, arXiv:2108.12979, arXiv:2102.07083, arXiv:2012.11813, and 19 more.

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