John Hazzidakis
(1844-1921)
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Ioannis "John" N. Hazzidakis (Ιωάννης Χατζιδάκις, or Hatzidakis or Chatzidakis, 1844 – 1921) was a Greek mathematician, known for the Hazzidakis transform in differential geometry. The Hazzidakis formula for the Hazzidakis transform can be applied in proving Hilbert's theorem on negative curvature, stating that hyperbolic geometry does not have a model in 3-dimensional Euclidean space.
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| Born |
1844
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| Died |
1921 (aged 76)
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