Prior Fitted Networks (PFNs) such as TabPFN now rival established statistical procedures across prediction and estimation tasks. A natural explanation is that PFNs have the property of statistical adaptivity, that is, they perform nearly as well as a method tailored to the true data-generating model for a heterogeneous...
Martin Eppert, K. Balasubramanian, Subhro Ghosh et al.· 0 citations
Pathwise gradients are preferred for continuous random variables because they are unbiased, low variance, and work with a single sample. For discrete variables, however, the pathwise identity cannot generally be exact for every differentiable function. We propose a general framework to construct finite-order exact path...
Adversarial training is one of the most reliable defenses against adversarial attacks, but its high computational cost must generally be paid anew for each task. Robust foundation models offer a promising alternative: adversarially pretrain a model once and then transfer its robustness to downstream tasks through light...
Learning an ensemble of GFlowNets to sample from a discrete target distribution has become a common approach for achieving better state space exploration and convergence than that of a monolithic sampler. However, these methods often add a substantial runtime overhead to the base model, and their conceptual connection...
Tiago da Silva, A. Souza, S. Lahlou· 0 citations
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Combinatorial Thompson sampling (CTS) draws independent posterior samples for every arm, so its exploration dynamics ignore any relation among arms. We study a minimal change to those dynamics: an LLM is queried once for a partition of the arms, the partition becomes a positive-definite correlation matrix $\Sigma$ thro...
Accurate forecasting of pathological outcomes is a central problem in psychology. To do so, psychologists often collect intensive longitudinal data. However, in such studies, the desire to acquire a large number of variables for the sake of accurate prediction is often counteracted by the need to minimize participant b...
Yunni Qu, Bing-Cai Kok, Whitney R. Ringwald et al.· 0 citations
A flow matching based algorithm is formulated which learns a transport map from the source to target trajectory distribution, while preserving the Markov structure, which is consistent in the population limit and derive finite-sample error bounds under mixing time assumptions.
Syamantak Kumar, D. Nagaraj, Saptarshi Roy et al.· 0 citations
Representations of translated sentences are similar in the inner layers of multilingual language models -- an observation connected to the platonic representation hypothesis, yet unexplained theoretically. We provide an explanation based on the assumption that data have a hidden hierarchical structure whose abstract le...
Darshil Doshi, Wen-Jie Zhou, C. Wegner et al.· 1 citation· ⚡1
The Fr\'echet Inception Distance (FID) is widely used to evaluate generative models, but its empirical plug-in estimator suffers from finite-sample bias [BSAG18, CF20]. We study the sample complexity $n$ of estimating FID to error $\epsilon$ between $d$-dimensional Gaussians with bounded mean distance and covariances,...
Ziyun Chen, Jerry Li, Kevin Tian et al.· 0 citations
This paper shows why reliable deployment requires checking the monitor's assumptions, comparing adaptation with the frozen model under realistic feedback, and limiting the effect of every protective response, and exposes a basic failure mode in self-monitored adaptation.
Wei-Jia Han, Li-Sha Qu, Zhen-Da Li et al.· 0 citations
In this paper, we study the sample complexities of value and policy learning in finite discounted Markov decision processes (MDPs) under recursive entropic risk preferences with risk parameter \(\beta\neq 0\), assuming access to a generative model of the MDP. We provide a refined analysis of model-based risk-sensitive...
Amirparsa Bahrami, Oliver Mortensen, Mohammad Sadegh Talebi· 0 citations
Quinazolin-4(3H)-one and quinazoline-2,4-dione cores represent key pharmacophores widely encountered in medicinal chemistry and materials science [1,2]. We present the crystal structures of three novel 4-chlorophenyl quinazolinones: 3-(4-chlorophenyl)-1-heptylquinazoline-2,4(1H,3H)-dione (I), 3-(4-chlorophenyl) -1-isob...
A.G. Tojiboev, F.A. Zulpanov, M. Bodensteiner et al.· Zenodo (CERN European Organi...· 0 citations
A machine-learning approach called CheMeleon provides a practical way to develop new drugs or other molecules with much less detailed, expensive experimentation.
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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