Final answer:
The Genaille-Lucas Rulers were based on an earlier invention by Rabbi Levi ben Gershon, a Jewish scholar from Provence, which was later advanced by Henri Genaille and Edouard Lucas.
Step-by-step explanation:
The Genaille-Lucas Rulers were likely invented by Rabbi Levi ben Gershon, also known as Gersonides. He was a Jewish scholar who lived in Provence, southern France during the medieval period. This tool, which is a calculating device, was conceived to simplify arithmetic operations, particularly multiplication and division. Although the rulers bear the name Genaille-Lucas, they are based on an earlier invention by Gersonides, which was later improved upon in the 19th century by Henri Genaille and Edouard Lucas, thereby receiving its current name.
The Genaille-Lucas Ruler was invented by mathematicians Henri Genaille and Édouard Lucas. The Genaille-Lucas Ruler is a mathematical device used for performing multiplication by a method called "ruler and compass multiplication." It is named after its inventors and is a physical ruler with sliding parts that allows for a mechanical and visual way to perform multiplication and factorization of numbers.