Sodin's conjecture on asymptotic dependence of local lengths

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Let x∈S2x\in \mathcal{S}^{2} and, for t∈Rt\in \mathbb{R}, let Ll;xt\mathcal{L}_{l;x}^{t} denote the random length of the unique component of fl−1(t)f_l^{-1}(t) that contains xx inside, or 00 if flf_l does not cross the level tt. For random variables XX and YY, write Corr⁡(X,Y)=Cov⁡(X,Y)/(Var⁡(X)Var⁡(Y))\operatorname{Corr}(X,Y)=\operatorname{Cov}(X,Y)/(\sqrt{\operatorname{Var}(X)}\sqrt{\operatorname{Var}(Y)}). Sodin's conjecture. For every x∈S2x\in \mathcal{S}^{2} and t1,t2∈Rt_{1},t_{2}\in \mathbb{R}, the local lengths are asymptotically fully dependent:

Corr⁡(Ll;xt1,Ll;xt2)=1−ol→∞(1).\operatorname{Corr}\left(\mathcal{L}_{l;x}^{t_{1}},\mathcal{L}_{l;x}^{t_{2}}\right)=1-o_{l\rightarrow\infty}(1).

This conjecture would explain the asymptotic full dependence observed for global level lengths and the resulting degeneracy of the defect variance. The surrounding discussion presents it as a possible explanation and does not provide a proof or resolution.

References

Primary source

Domenico Marinucci and Igor Wigman, “The defect variance of random spherical harmonics”, arXiv:1103.0232 (2011).

Additional references

2 papers in this index state this conjecture (2011). The statement above is taken from the most recent of them; the others are arXiv:1103.0150.

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