# [Generalized Cartan–Hadamard isoperimetry and Euclidean equality rigidity](paper.pdf)

**Author:** OpenAI

**Date:** September 23, 2026

## Citation

```bibtex
@misc{OAI:Generalized-Cartan-Hadamard-isoperimetry-and-Euclidean-equality-rigidity-September-23-2026,
  author = {{OpenAI}},
  title = {{Generalized Cartan--Hadamard isoperimetry and Euclidean equality rigidity}},
  howpublished = {OpenAI Math Release preprint
                  \href{https://github.com/openai/math/blob/main/preprints/Generalized-Cartan-Hadamard-isoperimetry-and-Euclidean-equality-rigidity-September-23-2026/paper.pdf}{OAI:Generalized-Cartan-Hadamard-isoperimetry-and-Euclidean-equality-rigidity-September-23-2026}},
  year = {2026}
}
```