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G. Di Fatta

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#machine learning Preprint Sep 2026

Gradient Surgery for Physics-Informed Neural Networks

Physics-Informed Neural Networks (PINNs) are trained by optimising a composite objective that combines data fitting with physics-based constraints, typically resulting in a highly imbalanced multi-task optimisation problem. Under these conditions, existing optimisation strategies are affected by conflicting task gradie...

Thomas Borsani, G. Di Fatta · 0 citations
Jul 2026

System-Wide Termination in Distributed Betweenness Centrality Computation

A lightweight, system-wide global termination detection algorithm that enables vertices to decide locally when the overall system has converged, and emphasises the need for coordinated halting in distributed centrality computation.

Siamak Abdi, Lucia Cavallaro, G. Di Fatta · 0 citations
Preprint Aug 2026

Operator-Theoretic Generalization Bounds for Multitask Deep Learning

Operator-theoretic generalization bounds for deep multi-output function classes are developed by representing network layers as Koopman composition operators on vector-valued reproducing kernel Hilbert spaces and derive Rademacher complexity bounds for invertible and width-expanding injective architectures.

Mahdi Mohammadigohari, Thomas Borsani, G. Di Fatta · 1 citation

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