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

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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=1∞Ai(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 n≥N0n\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.

References

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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