The Exceptional Tits Quadrangles Revisited

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2024

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Tits polygons are generalizations of Moufang polygons in which the neighborhood of each vertex is endowed with an “opposition relation.” There is a standard construction that produces a Tits polygon from an arbitrary irreducible spherical building of rank at least 3 when paired with a suitable Tits index. In this note, we complete the proof of a characterization of the Tits quadrangles that arise in this way from the spherical building associated to an exceptional algebraic group.

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Transformation groups 29 (2024), 1683 - 1698

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