Do We Really Need Permutations? Impact of Model Width on Linear Mode Connectivity

This paper demonstrates that simply widening neural network models, combined with suitable softmax temperature calibration, is sufficient to achieve linear mode connectivity without the need for parameter permutations, a phenomenon explained by the layerwise exponentially weighted connectivity (LEWC) property where merged layer outputs act as exponentially weighted sums of the original models' outputs.

Akira Ito, Masanori Yamada, Daiki Chijiwa + 1 more2026-03-06💻 cs

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