@misc{kriebel2026negativecurvature,
  author = {Kriebel, Alec},
  title = {A negative-curvature normal barrier on an algebraic cone that is not a hyperbolicity cone},
  year = {2026},
  month = oct,
  doi = {10.5281/zenodo.23440119},
  url = {https://aleckriebel.com/research/negative-curvature-normal-barrier-nonhyperbolicity-cone/},
  version = {1.0.0},
  publisher = {Zenodo},
  note = {Unrefereed preprint; version 1.0.0, dated 17 October 2026. Zenodo record created 17 October 2026 UTC. Prepared with extensive AI assistance.}
}