adaptive thresholding 1heteroskedastic variance 1needlets 1nonparametric estimation 1spherical data 1
From the 1 of 2 linked papers with an AI index.
2 papers
math.ST2026
Adaptive thresholding for wavelet-based nonparametric heteroskedastic variance estimation on the sphere
Claudio Durastanti, Radomyra Shevchenko
The paper proposes a fully data‑driven, multiresolution estimator using needlets and hard‑thresholding to adaptively estimate a spatially varying heteroskedastic variance function…
math.ST2026
Gaussian approximation for non-linearity parameter estimation in perturbed random fields on the sphere
Claudio Durastanti
We develop a probabilistic framework for the asymptotic analysis of a bispectrum-based estimator of primordial non-Gaussianity for isotropic random fields on the sphere in the high…