@article{understandingdiffusionmodelsviaratiobase,
  title = {Understanding Diffusion Models via Ratio-Based Function Approximation with SignReLU Networks},
  author = {Luwei Sun and Dongrui Shen and Jianfe Li and Yulong Zhao and Han Feng},
  year = {2026},
  eprint = {2601.21242},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.21242},
}