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Jordanus Nemorarius13th century mathematician.
Date of Birth: .
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Content:
- Jordanus Nemorarius: 13th Century Mathematician
- Contributions to Mathematics
- Algorismus Demonstratus
- Geometrical Works
- Other Treatises
- De ponderibus
- Disputed Attribution
- - "De numeris datis": a collection of algebraic problems
Jordanus Nemorarius: 13th Century Mathematician
Early Life and EducationJordanus Nemorarius is believed to have been born in Northern Italy in the early 13th century. Little is known about his early life and education, but it is speculated that he studied at the University of Padua.
Contributions to Mathematics
Arithmetical TreatisesJordanus is primarily known for his mathematical works, particularly his arithmetical treatises. One of his most famous works, "De elementis arismetice artis," was widely used as a textbook in Western Europe for centuries. It was based on the arithmetic of Boethius and introduced the use of letters to represent numbers.
Algorismus Demonstratus
In "Algorismus demonstratus," Jordanus examines various counting systems, including the verbal decimal system, the Indian written system, and operations on integers, fractions, and proportions.
Geometrical Works
De triangulisJordanus also wrote several geometrical treatises, including "De triangulis." This work contained theorems and problems related to triangles and their properties.
Other Treatises
Demonstratio de plana speraIn "Demonstratio de plana spera," Jordanus explores stereographic projection, demonstrating that the projection of a circle on a sphere onto a plane also forms a circle.
De ponderibus
"De ponderibus" examines the equilibrium of weights on levers and inclined planes, presenting an early concept similar to the principle of virtual work.
Disputed Attribution
Jordanus is also credited with several other mathematical treatises, though their authorship is disputed. These include:
- "De numeris datis": a collection of algebraic problems
- "Liber de proportionibus": a treatise on proportions- "De sphaera": a work on spherical astronomy
Later Life and Legacy
Jordanus Nemorarius's contributions to mathematics had a significant influence on the development of Western mathematics during the Middle Ages. His works were widely translated and studied for centuries, and his ideas continued to inspire mathematicians in the Renaissance and beyond.
