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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, surpristing or appealing that one has an urge to pass them on. Contributions are most welcome.
Supported by N.S.F. Research Grant DMS-0072607.
Supported by N.S.F. Research Grant DMS-0555803.
Many thanks to MPIM-Bonn for its hospitality.
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Schwartz, R.E., Tabachnikov, S. Elementary Surprises in Projective Geometry. Math Intelligencer 32, 31–34 (2010). https://doi.org/10.1007/s00283-010-9137-8
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DOI: https://doi.org/10.1007/s00283-010-9137-8