موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ل

Encyclopedia of scientists and inventors .. Scientists in order according to the nickname .. the letter L

⏹ Laplace, pdir Simon Marquis D
Laplace, Pierre Simon Marquis de

French mathematician and astronomer (1749 - 1827)
Laplace grew up in a simple environment. His father was a farm worker. · He was passionate about mathematics and astronomical and physical studies. • Laplace worked as a professor of mathematics at the Military College at an early age. He was an extreme republican. He held the position of Minister of Interior for a short period, and also held the position of Vice President of the Supreme Council of the Revolution. His political stances were fluctuating, and he received titles of honor from both parties.
At the time Laplace formulated the theory of surface tension.
It is based on molecular attraction in liquids, and he participated with Lavoisier in laying the foundations of thermochemistry through experiments on specific heat and heat of combustion.
Laplace discovered that the largest axis of the planetary orbits did not change, thus proving that Newton's fears that the solar system would not be disturbed were justified • It also explained the movement of Jupiter and Saturn, and solved a number of mathematical dilemmas in the solar system.
His book is entitled: A Study in the Mechanics of Celestial Bodies Traité de Mecanique Céleste.
In which he worked from 1799 until 1825, a good general and systematic study of the solar system. Laplace put forward the famous nebular theory (cosmic clouds), which says that the solar system arose from the shrinkage of a huge nebula, and it replaced the tidal theory.
Among his books also: Explanation of the system of the universe, in 1796 Exposition du Systeme du Monde.
Laplace discovered a differential equation that bears his name and is known as the Laplace transform. Laplace Transformation As he added a lot to the theory of modern possibilities, it appeared to him: The Analytical Theory of Probabilities in 1812
Theoretical analysis of probabilities
and a philosophical treatise on probabilities in the 1814 Essai Philosophique sur les Probabilités.

⏹ Lapworth, Charles Lapworth,

Scottish geologist (1842 - 1920) ·
Lapworth began his life as a schoolteacher in Galashiels. Through his geological interests he rose to the position of professor of geology at Birmingham
Labourth suggested using the name Ordovician to denote the formations between the Cambrian and Silurian periods.

⏹ Lagrange Joseph Lowe
Lagrange Joseph Louis

French mathematician (1736 - 1813)
Lagrange studied in Tiran and then worked as a professor of mathematics there when he was still eighteen · Lagrange won several awards while he was in Paris as a result of his theses on the emancipation of the moon in 1764 and the satellites of Jupiter in 1766.
Lagrange moved to Berlin to hold the position of director of the Academy, then returned to Paris and worked as a senior professor of engineering (geometrica) at the Polytechnic, and his successes and privileges made him more simple and humble. A complete solution for vibrating strings. Develop interpretations of echoes
Strokes and compound sounds, and expanded the theory of numbers and differential equations, and his contributions had an important impact on the development of mathematics. As a result of his exertion, he suffered bouts of severe melancholy.
Lagrange played a prominent role in selecting the standards enshrined by the French Revolution (as systems of measures and measures) and Lagrange's most prominent work was: Analytique Mécanique
Which he published in 1788 and has important works in mathematics.

⏹ Lassel, William Lassel , William

English astronomer (1799 - 1880)
Lasell emerged through his hobby for astronomy. He built his own telescope, which contains reflectors of excellent quality, with great skill in polishing. Since his childhood, Lasell discovered the closest satellites to the planet “Uranus,” (Uranus), which are Ariel and Umbriel. He also discovered a satellite of Neptune during A month from the date of the discovery of the planet Neptune itself was also discovered in addition to several hundred nebulae Nebulae.