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Acknowledgments
It is a pleasure to acknowledge stimulating discussions with S. Morier-Genoud, V. Ovsienko, I. Pak, and R. Schwartz. And many thanks to M. Cuntz for providing his (counter)examples. This work was supported by NSF grant DMS-1510055.
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This column is a place for those bits of contagious mathematics that travel from person to person in the community, because they are so elegant, surprising, or appealing that one has an urge to pass them on.
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Submissions should be uploaded to http://tmin.edmgr.comor sent directly to Sergei Tabachnikov, tabachni@math.psu.edu
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Tabachnikov, S. A Four-Vertex Theorem for Frieze Patterns?. Math Intelligencer 40, 14–18 (2018). https://doi.org/10.1007/s00283-018-9832-4
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DOI: https://doi.org/10.1007/s00283-018-9832-4