Dataset Card for skew-mixedp-ic16

This is the dataset used for the scaling up experiments for Panda: Patched Attention for Nonlinear Dynamics. (NOTE: We will release those improved scaled-up model checkpoints soon)

Details: Each subdirectory is the named for the {Driver}_{Response}-pp{param_idx} skew system, where both the Driver and the Response is a system of coupled ODEs and param_idx is the index of the specific parameter perturbation of the skew system. The files in each subdirectory correspond to different initial conditions, all with different number of "periods" on Fourier timescale. Specifically, we provide 16 initial conditions (each with different number of periods) for each parameter perturbation.

NOTE: we are working on a larger and improved dataset, with improved filtering for chaotic behavior. Stay tuned!

Paper abstract:

Chaotic systems are intrinsically sensitive to small errors, challenging efforts to construct predictive data-driven models of real-world dynamical systems such as fluid flows or neuronal activity. Prior efforts comprise either specialized models trained separately on individual time series, or foundation models trained on vast time series databases with little underlying dynamical structure. Motivated by dynamical systems theory, we present Panda, Patched Attention for Nonlinear DynAmics. We train Panda on a novel synthetic, extensible dataset of 2 \times 10^4 chaotic dynamical systems that we discover using an evolutionary algorithm. Trained purely on simulated data, Panda exhibits emergent properties: zero-shot forecasting of unseen real world chaotic systems, and nonlinear resonance patterns in cross-channel attention heads. Despite having been trained only on low-dimensional ordinary differential equations, Panda spontaneously develops the ability to predict partial differential equations without retraining. We demonstrate a neural scaling law for differential equations, underscoring the potential of pretrained models for probing abstract mathematical domains like nonlinear dynamics.

• Preprint: arXiv:2505.13755
• Repository: https://github.com/abao1999/panda

Citation

BibTeX:

If you find our work valuable for your research, please cite us:

@misc{lai2025panda,
      title={Panda: A pretrained forecast model for universal representation of chaotic dynamics}, 
      author={Jeffrey Lai and Anthony Bao and William Gilpin},
      year={2025},
      eprint={2505.13755},
      archivePrefix={arXiv},
      primaryClass={cs.LG},
      url={https://arxiv.org/abs/2505.13755}, 
}

Dataset samples showing a single system's multiple initial conditions, each with different periods: