Uniqueness conjecture for the positive dP_I^{(2)} solution

Let κ,τR\kappa,\tau\in\mathbb{R}, and consider the dPI(2)_{\rm I}^{(2)} equation for a sequence {βn(κ,τ)}n0\{\beta_n(\kappa,\tau)\}_{n\geq 0}, with initial values specified by the source. A solution is called positive when βn(κ,τ)>0\beta_n(\kappa,\tau)>0 for every n1n\geq 1. Uniqueness conjecture. For every κ,τR\kappa,\tau\in\mathbb{R}, there is a unique positive solution of the dPI(2)_{\rm I}^{(2)} equation satisfying

β0(κ,τ)=0,\beta_0(\kappa,\tau)=0,

and

βn(κ,τ)>0for all n1,\beta_n(\kappa,\tau)>0\quad\text{for all }n\geq 1,

corresponding to the stated initial values. This conjecture asserts that the orthogonality-motivated initial data select the unique globally positive solution, despite the sensitivity to perturbations and numerical precision described in the surrounding discussion. The source gives no resolution information.

Sources & referencesView supporting material

Primary source

Peter A. Clarkson, Kerstin Jordaan and Ana Loureiro, “Symmetric Sextic Freud Weight”, arXiv:2504.08522 (2025).

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