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Asymptotic equivalence of non-parametric regression with ...
[Submitted on 29 Aug 2025 (v1), last revised 24 Aug 2026 (this v · 2025-08-29 · via stat updates on arXiv.org

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Abstract:We study the asymptotic behavior of both spherical $t$-designs and random uniform designs as the set of sampling points in non-parametric regression with spherical regressors of arbitrary dimension. We show that the corresponding regression experiments are asymptotically equivalent, in the sense of Le Cam, to the same sequence of Gaussian white noise experiments as the sample size tends to infinity. More precisely, global asymptotic equivalence is established over spherical Sobolev balls (for both the fixed and the random uniform design case) and over spherical Besov balls (for the fixed design case). We also derive a matching non-equivalence result showing the sharpness of the imposed smoothness assumptions for any fixed choice of design points.

Submission history

From: Martin Kroll [view email]
[v1] Fri, 29 Aug 2025 14:20:51 UTC (742 KB)
[v2] Mon, 4 May 2026 05:50:00 UTC (1,220 KB)
[v3] Mon, 24 Aug 2026 06:09:18 UTC (1,220 KB)