Cannabaceae

Paul Guldin
Paul Guldin
Paul Guldin
Born12 June 1577
Died3 November 1643(1643-11-03) (aged 66)
NationalitySwiss
Other namesHabakkuk Guldin
Occupation(s)Jesuit
mathematician
astronomer
Known forGuldinus theorem

Paul Guldin (born Habakkuk Guldin; 12 June 1577 (Mels) – 3 November 1643 (Graz)) was a Swiss Jesuit mathematician and astronomer. He discovered the Guldinus theorem to determine the surface and the volume of a solid of revolution. (This theorem is also known as the Pappus–Guldinus theorem and Pappus's centroid theorem, attributed to Pappus of Alexandria.) Guldin was noted for his association with the German mathematician and astronomer Johannes Kepler.[1] Guldin composed a critique of Cavalieri's method of Indivisibles.[2]

Although of Jewish descent, his parents were Protestants and they brought Guldin up in that faith.[3] He was a professor of mathematics in Graz and Vienna.

In Paolo Casati's astronomical work Terra machinis mota (1658), Casati imagines a dialogue among Guldin, Galileo, and Marin Mersenne on various intellectual problems of cosmology, geography, astronomy and geodesy.

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Notes

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  1. ^ Schuppener, Georg (1 December 1997). "Kepler's relation to the Jesuits—A study of his correspondence with Paul Guldin". NTM Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin. 5 (1): 236–244. doi:10.1007/BF02913670. PMID 27742956. S2CID 32688599.
  2. ^ Amir Alexander (2014). Infinitesimal: How a Dangerous Mathematical Theory Shaped the Modern World. Scientific American / Farrar, Straus and Giroux. ISBN 978-0374176815.
  3. ^ O'Connor, John J.; Robertson, Edmund F., "Paul Guldin", MacTutor History of Mathematics Archive, University of St Andrews


One thought on “Cannabaceae

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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