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Mathias Niepert

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#machine learning Preprint Oct 2026

Characterizing and Mitigating Distributional Bias in Physics-Informed Generative Models

A data-anchored penalty is proposed that weights prediction errors by the residual Jacobian at the clean training sample and normalizes the resulting magnitude, which removes the incentive to relocate to less sensitive states without changing the model architecture or sampling procedure.

Tanja Bien, S. Darouich, L. Pastor-Pérez et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Geometry Meets Physics: Data-Efficient Pre-Training for Unstructured Neural PDE Solvers

Neural surrogate models for Partial Differential Equations (PDEs) on unstructured 3D geometries are often limited by poor generalization and the high cost of generating large-scale training datasets. Consequently, pre-training on massive datasets of related PDE dynamics has emerged as a critical alternative to enhance...

Luis Medrano-Navarro, G. Baldan, Qiang Liu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Fine-Tuning Diffusion Language Models with Context Selection and Target Weighting

GoldiMask is introduced, which selects tokens to reveal as context by approximately maximizing a submodular objective and weights the remaining targets according to how they benefit from the selected context and their remaining learning potential.

L. Mualem, L. Pastor-Pérez, Vinh Tong et al. · 0 citations
#machine learning Preprint Sep 2026

Parallel Tempering for Diffusion-Based Combinatorial Optimization

Discrete diffusion models have emerged as a powerful paradigm for solving combinatorial optimization (CO) problems on graphs by learning to sample high-quality solutions. A common inference-time approach is to generate multiple candidate solutions independently and return the best-performing sample, improving solution...

Arman Mielke, Uwe Bauknecht, Thilo Strauss et al. · 0 citations

SymDrift: One-Shot Generative Modeling under Symmetries

SymDrift is a framework that makes the drifting field itself symmetry-aware, and introduces two complementary strategies: a symmetrized drift in coordinate space based on optimal alignment, and a $G$-invariant embedding that removes symmetry ambiguity by construction.

S. Darouich, Vinh Tong, L. Pastor-Pérez et al. · 1 citation
#artificial intelligence Preprint Sep 2026

Equivariance Breaks the Learning Rate

Block normalization generally improves Adam and closes part of its gap to Muon across molecular force prediction on the rMD17 and MD22 datasets, QM9 molecular property prediction, and charged particle dynamics.

Andrei Manolache, Mathias Niepert · 0 citations
Preprint Aug 2026

Distillation of Foundation Models for Time-dependent PDEs

This work proposes Teacher Rollout Extension (TREX), a knowledge distillation framework that transfers the predictive capability of a pretrained foundation model into a compact and efficient student that can match or surpass the teacher's accuracy while reducing the number of parameters by several orders of magnitude a...

Daniel Musekamp, Boshra Ariguib, Andrei Manolache et al. · 0 citations

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