Author

Umberto Biccari

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Jul 2026

Interior interpretability with attention rollout: contraction and propagation profiles in Transformers

Attention rollout is used here as a diagnostic of attention-mediated propagation, not as a causal explanation or faithful attribution of the complete Transformer, but as a structural interpretation to the corresponding rollout propagation profile.

Umberto Biccari, Qianqi Huang, Enrique Zuazua · arXiv.org · 0 citations

#machine learning Preprint Sep 2026

Bi-HYCO: Bi-Objective Cooperative Learning for PDE Parameter Identification under Fragmented Observations

This work proposes Bi-Objective HYCO (Bi-HYCO), a cooperative framework that retains both representations and their local observational objectives while coupling their predicted states at unlabeled interaction points, and shows that removing state interaction while retaining aggregation deteriorates parameter recovery...

Umberto Biccari, Jun Chen, Roberto Morales et al. · 0 citations