Computational Geometry Column 41
<|reference_start|>Computational Geometry Column 41: The recent result that n congruent balls in R^d have at most 4 distinct geometric permutations is described.<|reference_end|>
@article{o'rourke2001computational,
    title={Computational Geometry Column 41},
    author={Joseph O'Rourke},
    journal={arXiv preprint arXiv:cs/0102004},
    year={2001},
    archivePrefix={arXiv},
    eprint={cs/0102004},
    primaryClass={cs.CG cs.DM}
}