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Author

Vaggos Chatziafratis

3 papers indexed here

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#artificial intelligence Preprint Oct 2026

Jailbreaking Open-Weight LLMs via Random Embedding Perturbations

While open-weight models have enjoyed steady progress in capabilities and wide adoption across multiple domains, their safety remains an important concern. One key feature is the ability to refuse or deflect harmful, malicious, or insensitive prompts. In this paper, we expose safety vulnerabilities across six common op...

A. Dubey, Scott Sirri, Vaggos Chatziafratis et al. · 0 citations
#machine learning Preprint Sep 2026

Optimal VC Dimension of Contrastive Learning with Margin

Contrastive learning is a successful paradigm for learning $d$-dimensional geometric representations from a collection of ``anchor--positive--negative''triplets $(i,j^{+},k^{-})$, indicating that ``item $i$ is closer to $j$ than to $k$.''Despite its success, understanding why contrastive learning leads to representatio...

Dionysis Arvanitakis, Vaggos Chatziafratis, Yi-Pei Luo et al. · 0 citations
#artificial intelligence Preprint Mar 2026

Tunable Latent Generative Priors for Compressed Sensing and Inverse Problems

This work develops tunable latent priors for diffusion models, normalizing flows, and variational autoencoders, leveraging nested dropout and shows empirically that tunable priors consistently achieve lower reconstruction errors than fixed-complexity baselines.

Sean Gunn, Jorio Cocola, Oliver De Candido et al. · 1 citation

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