Bayesian Inference for PDE-based Inverse Problems using the Optimization of a Discrete Loss

This paper introduces B-ODIL, a Bayesian extension of the Optimization of a Discrete Loss (ODIL) method that integrates PDE-based prior knowledge with data likelihood to solve inverse problems with quantified uncertainties, demonstrating its effectiveness through synthetic benchmarks and a clinical application for estimating brain tumor concentration from MRI scans.

Lucas Amoudruz, Sergey Litvinov, Costas Papadimitriou + 1 more2026-03-06🔬 physics

Breaking and Fixing Defenses Against Control-Flow Hijacking in Multi-Agent Systems

This paper demonstrates that existing alignment-based defenses against control-flow hijacking in multi-agent systems are vulnerable to evasion due to inherent safety-functionality conflicts and limited context visibility, and proposes ControlValve, a new defense mechanism that enforces control-flow integrity and least privilege through permitted control-flow graphs and contextual rules.

Rishi Jha, Harold Triedman, Justin Wagle, Vitaly Shmatikov2026-03-06🔒 cs.CR

Observer-Actor: Active Vision Imitation Learning with Sparse-View Gaussian Splatting

The paper introduces Observer-Actor (ObAct), a novel active vision imitation learning framework for dual-arm robots that dynamically assigns one arm to construct a 3D Gaussian Splatting representation and identify optimal viewing angles for the other arm, thereby significantly enhancing policy robustness and performance by reducing occlusions compared to static-camera setups.

Yilong Wang, Cheng Qian, Ruomeng Fan + 1 more2026-03-06💻 cs