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Template:Today in Math History for April 9

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Calendar of Today in Math History for April
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  • April 9, 1567 Christopher Clavius witnesses a solar eclipse from Rome.
  • April 9, 1834 Edmond Nicolas Laguerre is born in Bar-le-Duc.
  • April 9, 1869 Élie Joseph Cartan is born in Dolomien.