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Nathan Waniorek

5 papers hereh-index 435 citations7 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • last author5

Across the 5 of 5 papers where every author was matched, so the position is known.

fields
  • math.ST3
  • math.DS1
  • stat.ML1

identity via Semantic Scholar / OpenAlex

activity
20232026
collaborators
Showing math.STShow all

3 papers · 1 filter

math.ST2024

Optimal Estimation of Structured Covariance Operators

Omar Al-Ghattas, Jiaheng Chen, Daniel Sanz-Alonso +1

This paper establishes optimal convergence rates for estimation of structured covariance operators of Gaussian processes. We study banded operators with kernels that decay rapidly…

math.ST2024

Hierarchical Bayesian Inverse Problems: A High-Dimensional Statistics Viewpoint

Daniel Sanz-Alonso, Nathan Waniorek

This paper analyzes hierarchical Bayesian inverse problems using techniques from high-dimensional statistics. Our analysis leverages a property of hierarchical Bayesian regularizer…

math.ST2023

Covariance Operator Estimation: Sparsity, Lengthscale, and Ensemble Kalman Filters

Omar Al-Ghattas, Jiaheng Chen, Daniel Sanz-Alonso +1

This paper investigates covariance operator estimation via thresholding. For Gaussian random fields with approximately sparse covariance operators, we establish non-asymptotic boun…

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