arXiv:2606. 07982v1 Announce Type: new Abstract: High-dimensional transient heat diffusion under noisy boundary conditions exposes a fundamental limitation of classical numerical methods: accuracy degrades catastrophically where physical noise is unavoidable.
arXiv:2607. 12271v1 Announce Type: new Abstract: In this paper, a parametric physics-informed neural network for solving the heterogeneous soil thermal problem with borehole heat exchangers (BHEs) as singular sources is developed.
arXiv:2606. 12337v1 Announce Type: cross Abstract: Inverse problems governed by partial differential equations (PDEs) are central to computational mechanics and are commonly solved by adjoint-based optimization, while physics-informed neural networks (PINNs) have emerged as a flexible alternative.
arXiv:2605. 08318v2 Announce Type: replace Abstract: We study the problem of \emph{architecture selection} for deep learning models trained to solve partial differential equations (PDEs), asking when transformer-based architectures with learned attention outperform Fourier-domain neural operators.
arXiv:2608.30328v1 Announce Type: new Abstract: Classical numerical solvers for partial differential equations (PDEs) are computationally expensive to solve repeatedly across varying initial conditio...
arXiv:2606. 19754v1 Announce Type: new Abstract: Partial differential equations (PDEs) play a central role in modeling complex physical, biological, and engineering systems.
Physics‑Informed Neural Networks (PINNs) often fail on stiff or advection‑dominated partial differential equations. This study compares two proposed fixes—switching from FP32 to FP64 precision to address an L‑BFGS stopping artifact, and replacing the MLP with a state‑space‑model (SSM) backbone plus sub‑sequence alignment to mitigate architectural simplicity bias—using a pre‑registered, seed‑paired 144‑run experiment across convection, reaction, and wave problems, plus an independent 85‑run study. The results show that the remedies act on disjoint subsets of regimes and seeds: precision changes affect some seeds in opposite directions, alignment improves success in hard convection cases, and the SSM backbone alone succeeds on many reaction seeds, but none of the remedies fully substitutes for the other, and all must be evaluated jointly and reported per seed.
arXiv:2606. 18175v1 Announce Type: cross Abstract: We present a numerical method for the forward solution of nonlinear partial differential equations (PDEs) in which Bellman-Kalaba quasilinearization reduces the nonlinear problem to a sequence of linear subproblems, each discretized by collocation onto a trial space that is linear in its parameters and solved by a single direct linear least-squares QR factorization.
The study compares two methods for computing spatial derivatives in physics‑informed neural networks (PINNs): automatic differentiation (AD) and Fourier spectral differentiation. Using identical neural architectures, training schedules, and data sampling, the authors evaluate both approaches on periodic PINNs for the Allen–Cahn, Korteweg–de Vries, and Kuramoto–Sivashinsky equations. Fourier spectral differentiation achieves significant speedups (2.90×–18.52×) and reduces GPU memory usage by 68.7%–94.1% while maintaining comparable solution accuracy.
arXiv:2606. 02623v1 Announce Type: cross Abstract: Solving time-dependent partial differential equations (PDEs) is an important problem in computational science and engineering.
arXiv:2606. 01122v1 Announce Type: new Abstract: We propose a five-step diagnostic protocol for residual-trained neural HJB-PIDE solvers with control-dependent L\'evy jumps, targeting a general failure mode of neural PDE methods: a learned solution can match headline scalar diagnostics while miscomputing an operator inside its training loss.
arXiv:2609.22349v1 Announce Type: cross Abstract: Transient pressure diffusion in heterogeneous porous media becomes difficult to resolve efficiently when permeability is discontinuous and spans seve...