Abner of Burgos: The Missing Link between Nasir al-Din al-Tusi and Nicolaus Copernicus?

  title={Abner of Burgos: The Missing Link between Nasir al-Din al-Tusi and Nicolaus Copernicus?},
  author={Michael Nosonovsky},
The geometrical theorem known as the ‘Tusi couple’ was first discovered by Persian astronomer Nasir al-Din al-Tusi (1201–1274). The Tusi couple was believed to be discovered for Europeans by Nicolaus Copernicus (1473–1543) and it played an important role in the development of his planetary system. It has been suggested by Willy Hartner, that Copernicus borrowed it from al-Tusi, however, a particular way of transmission is not known. In this article I show that Spanish-Jewish author Abner of… 
3 Citations

Friction and Dynamics of Verge and Foliot: How the Invention of the Pendulum Made Clocks Much More Accurate

The tower clocks designed and built in Europe starting from the end of the 13th century employed the “verge and foliot escapement” mechanism. This mechanism provided a relatively low accuracy of time

Ternary Logic of Motion to Resolve Kinematic Frictional Paradoxes

This work investigates another possibility to resolve the paradoxes of dry friction: the introduction of the three-value logic and relates the ternary logic approach with the entropic stability criteria for a frictional system and with the study of ultraslow sliding friction.

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Tese de mestrado, Historia e Filosofia das Ciencias, Universidade de Lisboa, Faculdade de Ciencias, 2019