An elementary proof of Sierksma's conjecture for seven points in the plane

A minimal citation using the imported metadata. Journal references are retained in the note field.

@misc{soberon-2026-sierksma-seven-points,
  title = {{An elementary proof of Sierksma's conjecture for seven points in the plane}},
  author = {Pablo Soberón},
  year = {2026},
  eprint = {2604.18485},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2604.18485}
}