# [A counterexample to Naimark's problem in ZFC](naimark-counterexample-zfc.pdf)

**Author:** OpenAI

**Date:** September 24, 2026

## Citation

```bibtex
@misc{OAI:A-counterexample-to-Naimarks-problem-in-ZFC-September-24-2026,
  author = {{OpenAI}},
  title = {{A counterexample to Naimark's problem in ZFC}},
  howpublished = {OpenAI Math Release preprint
                  \href{https://github.com/openai/math/blob/main/preprints/A-counterexample-to-Naimarks-problem-in-ZFC-September-24-2026/naimark-counterexample-zfc.pdf}{OAI:A-counterexample-to-Naimarks-problem-in-ZFC-September-24-2026}},
  year = {2026}
}
```