The Discrete Mathematical Charms of Paul Erdős

@inproceedings{Chvtal2021TheDM,
  title={The Discrete Mathematical Charms of Paul Erdős},
  author={Vasek Chv{\'a}tal},
  year={2021}
}
The Dirac-Goodman-Pollack Conjecture
In one of their seminal articles on allowable sequences, Goodman and Pollack gave combinatorial generalizations for three problems in discrete geometry, one of which being the Dirac conjecture.