284 BC - 221 BC

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Ctesibius or Ktesibios or Tesibius (Greek: Κτησίβιος; fl. 285–222 BC) was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. He wrote the first treatises on the science of compressed air and its uses in pumps (and even in a kind of cannon). Read more on Wikipedia

Since 2007, the English Wikipedia page of Ctesibius has received more than 231,429 page views. His biography is available in 37 different languages on Wikipedia. Ctesibius is the 80th most popular mathematician (up from 82nd in 2019), the 87th most popular biography from Egypt (down from 80th in 2019) and the 5th most popular Mathematician.

Ctesibius is most famous for inventing the aeolipile, a device that is similar to a modern day steam engine.

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    Coefficient of Variation (CV)

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Among mathematicians, Ctesibius ranks 80 out of 823Before him are Giuseppe Peano, Andrey Kolmogorov, Richard Dedekind, Augustus De Morgan, Regiomontanus, and Alexander Grothendieck. After him are Friedrich Bessel, Pappus of Alexandria, Johann Heinrich Lambert, Felix Klein, Bonaventura Cavalieri, and Paul Erdős.

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Among people born in 284 BC, Ctesibius ranks 2Before him is Ptolemy III Euergetes.  Among people deceased in 221 BC, Ctesibius ranks 2Before him is Hasdrubal Barca. After him are Berenice II of Egypt, Hasdrubal the Fair, Conon of Samos, Antigonus III Doson, and Lucius Caecilius Metellus.

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In Egypt

Among people born in Egypt, Ctesibius ranks 87 out of 582Before him are Saint Menas (285), Mohamed Morsi (1951), Ayman al-Zawahiri (1951), Saint Sarah (100), Athenaeus (200), and Djedefre (-2600). After him are Pappus of Alexandria (290), Abdel Fattah el-Sisi (1954), Fuad I of Egypt (1868), Ptolemy VIII Physcon (-182), Al-Hakim bi-Amr Allah (985), and Mohamed Naguib (1901).


Among mathematicians born in Egypt, Ctesibius ranks 5Before him are Euclid (-350), Hypatia (350), Diophantus (201), and Hero of Alexandria (10). After him are Pappus of Alexandria (290), Theon of Alexandria (335), Menelaus of Alexandria (70), Ibn Yunus (950), and Abū Kāmil Shujāʿ ibn Aslam (850).