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Encyclopedia > Paul Guldin

Paul Guldin (original name Habakkuk Guldin) (June 12, 1577 - November 3, 1643) was a mathematician and astronomer. He discovered the Guldinus theorem to determine the surface and the volume of a solid of rotation. This theorem is also known as Pappus-Guldinus theorem and Pappus's centroid theorem, attributing Pappus of Alexandria.


He was born in St. Gallen, Switzerland and was a professor of mathematics in Graz and Vienna.


  Results from FactBites:
 
Special Collections | The Dibner Library of the History of Science and Technology (2151 words)
Guldin in 1622 believed that any large body whose center of gravity is not at the center of the universe would, if unimpeded, tend towards the latter.
In the first volume of his work, Guldin determined the centers of gravity of plane and solid figures and countered attacks made against his earlier work by Niccolò Cabeo in his Philosophia magnetica of 1629 (a copy of which is in the Dibner Library).
Guldin's volume continues with his work on finding the surfaces and volumes of various solids of revolution, a direct follow-up to the work of Johannes Kepler in his Nova stereometria doliorum vinariorum of 1615 (also in the Dibner Library).
Paul Guldin, S.J. (1292 words)
Paul Guldin was born Habakuk Guldin in Saint Gall, Switzerland to a Jewish family and in 1643 died in Gratz.
Guldin did not know that the fundamental theorem which bears his name and which he used extensively, is found in a somewhat vague form in the Collection of the well-known Greek mathematician Pappus (ca.
Although Paul Guldin also was the chief critic of Kepler in his use of infinitesimals because of a lack of rigor and mathematical foundation, he was quite devoted to Kepler's studies and well-being.
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