Some incidence theorems and integrable discrete equations (Q2509094)

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Some incidence theorems and integrable discrete equations
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    Some incidence theorems and integrable discrete equations (English)
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    16 October 2006
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    In 1848, Möbius published a generalization of Pascal's Theorem about hexagons inscribed in a conic section. The author reformulates Möbius' Theorem in two different ways which enables him to easily derive both the double cross-ratio equation and the Hietarinta equation. He demonstrates that the construction corresponding to the double cross-ratio is a reduction to a conic section of some planar configuration.
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    planar projective geometry
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    incidence theorem
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    Pascal theorem
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    Hietarinta equation
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    cross-ratio
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    planar configuration
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