Conjecture on simultaneous analytic images of Liouville matrices

Let n2n\ge 2 and let IRI\subseteq\mathbb{R} be an open interval containing 00. Let Ln,n\mathscr{L}_{n,n} denote the set of Liouville matrices, and let \textswabfk\textswab{f}_k and \textswabgk\textswab{g}_k be the extensions associated with sequences of analytic functions fk,gk:IRf_k,g_k:I\to\mathbb{R}, respectively. For a,b,c,dRa,b,c,d\in\mathbb{R}, let τa,b,c,d\tau_{a,b,c,d} denote the function referred to in the source as equation (4). Assume that, for every k1k\ge 1, gkg_k is not of the form τa,b,c,d\tau_{a,b,c,d}, and that no fk1f_{k_1} is identical on II to τa,b,c,dgk2\tau_{a,b,c,d}\circ g_{k_2} for any a,b,c,dRa,b,c,d\in\mathbb{R} and k1,k2Nk_1,k_2\in\mathbb{N}. Conjecture on simultaneous analytic images of Liouville matrices. There exists ALn,nA\in\mathscr{L}_{n,n} such that

\textswabfk(A)Ln,nand\textswabgk(A)Ln,n\textswab{f}_k(A)\in\mathscr{L}_{n,n}\quad\text{and}\quad \textswab{g}_k(A)\notin\mathscr{L}_{n,n}

for every k1k\ge 1. Equivalently,

k1(\textswabfk1(Ln,n)\textswabgk1(Ln,nc))Ln,n.\bigcap_{k\ge 1}\left(\textswab{f}_k^{-1}(\mathscr{L}_{n,n})\cap\textswab{g}_k^{-1}(\mathscr{L}_{n,n}^{c})\right)\cap\mathscr{L}_{n,n}\ne\emptyset.

This conjecture combines the preceding results on analytic images of Liouville matrices and would provide a simultaneous positive/negative image theorem under the stated exclusions. The supplied context does not indicate whether it has been resolved.

Sources & referencesView supporting material

Primary source

Johannes Schleischitz, “Maillet's property and Mahler's Conjecture on Liouville numbers fail for matrices”, arXiv:2403.14434 (2024).

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