Numerical rigidity conjecture for the intervals of U(1,n)

For each nn, write the generalized Ulam set U(1,n)U(1,n) as its unique disjoint union of interval components

U(1,n)=i=1Ai(n),Ai(n)=[ai(n),bi(n)]Z.U(1,n)=\bigsqcup_{i=1}^{\infty}A_i(n),\qquad A_i(n)=[a_i(n),b_i(n)]\cap\mathbb{Z}.

Numerical rigidity conjecture. There exists an integer N0>1N_0>1 such that, for every nN0n\geq N_0, the endpoints are given by

ai(n)=(n+B)mi+εi,a_i(n)=(n+B)m_i+\varepsilon_i, bi(n)=(n+B)pi+δi,b_i(n)=(n+B)p_i+\delta_i,

where mi,pi,εi,δim_i,p_i,\varepsilon_i,\delta_i do not depend on nn, B,ε,δ>0B,\varepsilon,\delta>0 are real constants, mi,pim_i,p_i are integers, and εi<ϵ|\varepsilon_i|<\epsilon, δi<δ|\delta_i|<\delta. This predicts eventual linear dependence, with uniformly bounded endpoint errors, for the interval decomposition of U(1,n)U(1,n); it is presented as based on numerical data and is not proved in the supplied text.

Sources & referencesView supporting material

Primary source

Joshua Hinman, Borys Kuca, Alexander Schlesinger and Arseniy Sheydvasser, “The Unreasonable Rigidity of Ulam Sets”, arXiv:1711.00145 (2017).

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