Gilles de Roberval
Who was Gilles de Roberval?
French mathematician (*1602 – †1675)
Biographical data adapted from Wikipedia’s article on Gilles de Roberval (CC BY-SA 4.0).
Biography
Gilles Personne de Roberval (1602-1675) was a French mathematician and physicist with contributions in geometry, mechanics, and mathematical analysis during the scientific revolution of the 17th century. Born Gilles Personne in Roberval near Beauvais, he adopted his hometown as his surname, becoming Gilles de Roberval. His work connected classical geometry with the new analytical methods that shaped modern mathematics.
Roberval studied at the Collège de France, where he later became a professor of mathematics. To keep his job, he had to defend his position every three years in a competitive exam, which helped him stay on top of new mathematical ideas. He held this position for over 40 years, from 1634 until his death in 1675, making key contributions to the institution's standing as a hub of mathematical learning.
His contributions included a method for finding tangents to curves, which set the stage for calculus’s development. Roberval also came up with techniques to calculate areas under curves and volumes of solids of revolution, furthering infinitesimal methods. He worked on problems involving the cycloid curve, engaging in the mathematical debates of his time.
In physics and mechanics, Roberval is known for the Roberval balance, a clever weighing device that kept horizontal balance no matter where weights were placed. This invention showed his practical use of mechanical principles and became widely used in trade and scientific measurement. His studies of motion and equilibrium laid the groundwork for what became analytical mechanics.
Roberval corresponded with leading mathematicians like Pierre de Fermat, Blaise Pascal, and Marin Mersenne, engaging in the shared development of mathematical knowledge in the 17th century. He died in Paris on October 27, 1675, leaving behind significant work that influenced both pure and applied science.
Before Fame
Born into modest circumstances in rural France in the early 17th century, Roberval's journey to becoming a renowned mathematician began with his education at local schools before moving on to the Collège de France. The early 1600s saw a renewed interest in math, driven by practical needs in navigation, astronomy, and engineering, as well as the rediscovery and translation of ancient Greek mathematical texts.
During Roberval's youth, French interest in math was growing significantly, with institutions like the Collège de France promoting new ways of teaching and researching math. His exceptional talent in geometry and problem-solving earned him recognition among scholars, eventually leading to his appointment as the mathematics chair at the Collège, where the competitive nature of the position required ongoing mathematical innovation and discovery.
Key Achievements
- Developed early methods for finding tangents to curves and calculating areas under curves
- Invented the Roberval balance, a precise weighing instrument with practical commercial applications
- Held the prestigious mathematics chair at the Collège de France for over 40 years
- Contributed to the study of the cycloid curve and related geometric problems
- Advanced techniques in infinitesimal geometry that influenced the development of calculus
Did You Know?
- 01.He kept his mathematical methods secret to maintain his competitive advantage in the triennial examinations required to keep his professorship at the Collège de France
- 02.Roberval's original surname was Personne or Personier, but he adopted the name of his birthplace as was common among scholars of his era
- 03.He engaged in a priority dispute with Evangelista Torricelli over the method of indivisibles for calculating areas and volumes
- 04.The Roberval balance he invented could accurately weigh objects even when they were not centered on the weighing pans
- 05.He corresponded with René Descartes but disagreed with some aspects of Cartesian geometry and philosophy