Doubly distributive hyperfields satisfy the inheritance property

Let pH[X]p\in\mathbb{H}[X] be a polynomial, and let ApA_p be its list of roots, including repetitions corresponding to multiplicities. A hyperfield has the inheritance property at pp if, for every subset {aj1,,ajm}Ap\{a_{j_1},\dots,a_{j_m}\}\subseteq A_p with mdeg(p)m\leq\operatorname{deg}(p), there exists qH[X]q\in\mathbb{H}[X] such that

p(Xaj1)(Xaj2)(Xajm)q.p\in (X-a_{j_1})\odot(X-a_{j_2})\odot\dots\odot(X-a_{j_m})\odot q.

It has the inheritance property in general if this holds for every polynomial pH[X]p\in\mathbb{H}[X].

Inheritance-property conjecture. All hyperfields with the doubly distributive property satisfy the inheritance property.

The inheritance property is introduced to address the non-uniqueness of polynomial factorisations over hyperfields, even for doubly distributive hyperfields. The paper presents this as an open direction needed to extend the field-theoretic factorisation arguments underlying its version of Kapranov's theorem.

Sources & referencesView supporting material

Primary source

James Maxwell, “Generalising Kapranov's Theorem For Tropical Geometry Over Hyperfields”, arXiv:2108.01524 (2022).

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