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Author

Alexander Nemecek

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#artificial intelligence Preprint Oct 2026

Sequent-Prover: Training Agents for Formal, Checkable SMT-based Reasoning

We introduce Sequent-Prover, a family of verifier-using language-model agents, and the post-training framework that produces them. Agents reason in an executable SMT-LIB scratchpad: they write complete SMT-LIB programs, query Z3 across turns, inspect solver feedback, repair formalizations, and terminate with an explici...

Debargha Ganguly, Wei-Cong Chen, Mohsen Hariri et al. · 3 citations
Preprint Aug 2026

Auditing Cross-Lingual Fairness in Language Model Watermarking

Applied to six watermarking schemes, three open-weight generators, eleven languages spanning four scripts and eight typological families, and both base and instruction-tuned regimes, the framework reveals failure modes that single-language single-paradigm evaluation cannot surface.

Alexander Nemecek, Osama Zafar, Debargha Ganguly et al. · 1 citation

The End of Trust: How Agentic AI Breaks Security Assumptions

The Infinite Impostor is introduced, an attack model in which an autonomous agent interposes itself between two parties who already trust each other, hijacking an existing relationship rather than building a new one from scratch, and the governance tensions that arise when platforms become the regulatory substrate of d...

Osama Zafar, Alexander Nemecek, Erman Ayday · 0 citations

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