# [Essential Singularity of the Correlation Length in the Planar XY Model](paper.pdf)

**Author:** OpenAI

**Date:** October 5, 2026

## Citation

~~~bibtex
@misc{OAI:Essential-Singularity-of-the-Correlation-Length-in-the-Planar-XY-Model-October-5-2026,
  author = {{OpenAI}},
  title = {{Essential Singularity of the Correlation Length in the Planar XY Model}},
  howpublished = {OpenAI Math Release preprint
                  \href{https://github.com/openai/math/blob/main/preprints/Essential-Singularity-of-the-Correlation-Length-in-the-Planar-XY-Model-October-5-2026/paper.pdf}{OAI:Essential-Singularity-of-the-Correlation-Length-in-the-Planar-XY-Model-October-5-2026}},
  year = {2026}
}
~~~