# [Spacetime Penrose inequalities: enclosing area, charge, and rigidity](paper.pdf)

**Author:** OpenAI

**Date:** October 5, 2026

## Citation

```bibtex
@misc{OAI:Spacetime-Penrose-inequalities-enclosing-area-charge-and-rigidity-October-5-2026,
  author = {{OpenAI}},
  title = {{Spacetime Penrose inequalities: enclosing area, charge, and rigidity}},
  howpublished = {OpenAI Math Release preprint
                  \href{https://github.com/openai/math/blob/main/preprints/Spacetime-Penrose-inequalities-enclosing-area-charge-and-rigidity-October-5-2026/paper.pdf}{OAI:Spacetime-Penrose-inequalities-enclosing-area-charge-and-rigidity-October-5-2026}},
  year = {2026}
}
```