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Kolyan Ray

4 accepted papers

2023

Pointwise uncertainty quantification for sparse variational Gaussian process regression with a Brownian motion prior

NeurIPS 2023poster

We study pointwise estimation and uncertainty quantification for a sparse variational Gaussian process method with eigenvector inducing variables. For a rescaled Brownian motion prior, we derive theoretical guarantees and limitations for the frequentist size and coverage of pointwise credible sets.…

Cited by 6SourcePDFScholar
2022

On the inability of Gaussian process regression to optimally learn compositional functions

NeurIPS 2022accept

We rigorously prove that deep Gaussian process priors can outperform Gaussian process priors if the target function has a compositional structure. To this end, we study information-theoretic lower bounds for posterior contraction rates for Gaussian process regression in a continuous regression model…

Cited by 20SourcePDFScholar
2020

Spike and slab variational Bayes for high dimensional logistic regression

NeurIPS 2020poster

Variational Bayes (VB) is a popular scalable alternative to Markov chain Monte Carlo for Bayesian inference. We study a mean-field spike and slab VB approximation of widely used Bayesian model selection priors in sparse high-dimensional logistic regression. We provide non-asymptotic theoretical guar…

Cited by 48SourcePDFScholar