






















49 years




Johann Heinrich Lambert (JeanHenri Lambert in French) was a Swiss polymath who made important contributions to the subjects of mathematics, physics (particularly optics), philosophy, astronomy and map projections. Edward Tufte calls him and William Playfair "The two great inventors of modern graphical designs".
Lambert was the first to introduce hyperbolic functions into trigonometry. Also, he made conjectures regarding nonEuclidean space. Lambert is credited with the first proof that Pi is irrational by using a generalized continued fraction for the function tan x. Euler believed the conjecture but could not prove that Pi was irrational, and it is speculated that Aryabhata also believed this, in 500 CE. Lambert also devised theorems regarding conic sections that made the calculation of the orbits of comets simpler....



Johann Heinrich Lambert (JeanHenri Lambert in French) was a Swiss polymath who made important contributions to the subjects of mathematics, physics (particularly optics), philosophy, astronomy and map projections. Edward Tufte calls him and William Playfair "The two great inventors of modern graphical designs".
Lambert was the first to introduce hyperbolic functions into trigonometry. Also, he made conjectures regarding nonEuclidean space. Lambert is credited with the first proof that Pi is irrational by using a generalized continued fraction for the function tan x. Euler believed the conjecture but could not prove that Pi was irrational, and it is speculated that Aryabhata also believed this, in 500 CE. Lambert also devised theorems regarding conic sections that made the calculation of the orbits of comets simpler....
More • http://en.wikipedia. ... ch_Lambert
View • Books
• Images
• Videos
• Search
Related •
Astronomers
• Mathematicians
• Philosophers
• Polymaths
• August 26
• France
• Industrial Revolution
• Mathematics
• Optics
• Physicists
• Physics
• Switzerland
• Virgo
• 17th Century
• 18th Century
• People














Euclid of Alexandria, Father of Geometry
Euclid, sometimes called Euclid of Alexandria to distinguish him from Euclides of Megara, was a Greek mathematician, often referred to as the "father of geometry". He was active in Alexandria during the reign of Ptolemy I (323–283 BC). His Elements i... 






Aryabhata, Inventor of the Digit Zero
Aryabhata is the first of the great astronomers of the classical age of India. He was born in 476 AD in Ashmaka but later lived in Kusumapura, which his commentator Bhaskara I (629 AD) identifies with Patilputra (modern Patna).
Aryabhata gave the... 






Euler, Mathematician and Physicist
Leonhard Euler was a pioneering Swiss mathematician and physicist. He made important discoveries in fields as diverse as infinitesimal calculus and graph theory. He also introduced much of the modern mathematical terminology and notation, particularl... 






Frederick II of Prussia, The Great
Frederick the Great was the Hohenzollern King of Prussia from 1740 to 1786 and is regarded as one of the "enlightened despots" of 18th century Europe. He was highly educated and built his government as a model of efficiency, creating the first modern... 






Immanuel Kant, German Philosopher
Immanuel Kant was a German philosopher who is widely considered to be a central figure of modern philosophy. He argued that fundamental concepts structure human experience, and that reason is the source of morality. His thought continues to have a ma... 



















2022 © Timeline Index 
