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data science

3,686 papers

#machine learning Preprint Open access Sep 2026

Learning to Approximate Uniform Facility Location via Graph Neural Networks

Neural networks, particularly message-passing neural networks (MPNNs), are increasingly used as heuristics for hard combinatorial optimization problems. Yet many learning-based methods rely on supervision, reinforcement learning, or gradient estimators, causing high computational cost, unstable training, or limited gua...

Chendi Qian, Christopher Morris, Stefanie Jegelka et al. · 0 citations
#machine learning Preprint Jan 2026

Inverse Problems Conditioned on Observation Ensembles: Applications and Methods

We introduce a new multivariate statistical problem that we refer to as the Ensemble-conditioned Inverse Problem (EIP). The aim of EIP is to invert for an ensemble that is distributed according to the pushforward of a prior under a forward process. In high energy physics (HEP), this is related to a widely known problem...

Zheng-Yan Huan, C. Pazos, Martin Klassen et al. · 0 citations
#machine learning Preprint Open access Sep 2026

Localized Diffusion Models

Diffusion models are state-of-the-art tools for various generative tasks. Yet training these models involves estimating high-dimensional score functions, a task that in principle suffers from the curse of dimensionality. It is therefore important to understand how low-dimensional structure in the target distribution ca...

Georg A. Gottwald, Shuigen Liu, Youssef Marzouk et al. · 0 citations
#machine learning Preprint Sep 2020

Random Polytope Descriptors

This work introduces a class of random polytopes which simultaneously generalizes several known constructions and indicates how these properties can be exploited for classification and clustering tasks in data analysis.

M. Joswig, M. Kaluba, Lukas Ruff · 4 citations · ⚡1
#machine learning Preprint Sep 2026

Local Geometric Mixing via Dobrushin Contraction with Applications to Diffusion Path Monte Carlo and the Proximal Sampler

This work establishes and discusses local geometric mixing bounds through Dobrushin contraction, and applies this approach to Diffusion Path Monte Carlo, a recently proposed Markov chain Monte Carlo method aimed at leveraging advances in score-based modeling.

Stefan Oberdorster · 0 citations
#machine learning Preprint Sep 2026

How Sensitive Are LLM Leaderboard Claims to Hidden Model Selection?

LLM leaderboard gains can reflect selection among privately evaluated model variants, yet neither the number of variants nor their dependence is public. We ask how many hidden variants a published margin can support while retaining statistical evidence of a provider's advantage over a fixed comparator. For a fixed cand...

Chen Yang, Jun Chen · 0 citations
#machine learning Preprint Sep 2026

NPBoost: Neural Processes with Gradient-Boosted Fixed Effects

This work introduces Neural Process Boosting (NPBoost), which decomposes structured response variability into tree-boosted fixed effects shared across tasks and NP random effects that capture stochastic task-to-task variation.

Andrea Nava, Ken Rölli, Armin Begić et al. · 0 citations
#machine learning Preprint Sep 2026

Improving Ensemble Filters with Flow Matching

Data assimilation estimates a dynamical state from partial and noisy observations. Classical ensemble filters are efficient but restrict analysis updates through finite sample covariance and affine Gaussian distribution. We introduce the Flow Ensemble Filter (FlowEF), which uses conditional flow matching to transport t...

Hao-Yuan Chen, Alexandre Hoang Thiery · 0 citations
#machine learning Preprint Aug 2026

Conformal Bayes under Continuous Label Shift: Sensitivity Analysis and the Limits of Exact Validity

JTS-SCB forms a bounded sensitivity envelope over candidate tilts, but its calibration-only construction does not inherit the exact finite-sample weighted-conformal guarantee, so experiments show that strong plug-in predictive sampling can match the oracle when the shift is well identified, while sensitivity analysis i...

Seung-Jin Choi · 0 citations
#machine learning Preprint Aug 2026

Dirichlet Process Mixtures of Trees with Gaussian Process Splits: A Bayesian Nonparametric Framework with Posterior Contraction Rate

We propose a Bayesian nonparametric mixture of regression trees with a Dirichlet process prior over tree-parameter pairs, enabling data-driven selection of ensemble size and unifying CART, BART, random forests, and boosting. A novel splitting rule driven by the posterior predictive of a Gaussian process within each ter...

Subhasish Basak, Anik Roy, Sourabh Bhattacharya · 0 citations
#machine learning Preprint Aug 2026

Theoretical Study on the Evidential Learning-based Variational Autoencoder

A normal--inverse-gamma (NIG) latent hierarchy has four parameters, but its induced latent law does not identify all four. For $\sigma^2\sim\mathrm{InvGamma}(\alpha,\beta)$, $\mu\mid\sigma^2\sim\mathcal{N}(\gamma,\sigma^2/\nu)$, and $z\mid\mu,\sigma^2\sim\mathcal{N}(\mu,\sigma^2)$, the marginal law of $z$ depends on $(...

Wan-Ming Ge · 1 citation

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GPT-Lab Nov 3, 2026

Sovereignty Is the Option to Leave

Is your company’s AI sovereign? A practical guide for CIOs on AI vendor lock-in, EU Data Act switching, cloud sovereignty, and testing your exit plan before you need it. The post Sovereignty Is the Option to Leave appeared first on GPT-Lab.

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