He carried out the official investigation into the accident in a characteristically thorough and humane way.ДЄt the same time, PoincarГ© was preparing for his Doctorate in Science in mathematics under the supervision of Charles Hermite.

He was on the scene of a mining disaster at Magny in August 1879 in which 18 miners died. ДЄs a graduate of the Г‰cole des Mines, he joined the Corps des Mines as an inspector for the Vesoul region in northeast France.

From November 1875 to June 1878 he studied at the Г‰cole des Mines, while continuing the study of mathematics in addition to the mining engineering syllabus, and received the degree of ordinary mining engineer in March 1879. There he studied mathematics as a student of Charles Hermite, continuing to excel and publishing his first paper ( DГ©monstration nouvelle des propriГ©tГ©s de l'indicatrice d'une surface) in 1874. PoincarГ© entered the Г‰cole Polytechnique as the top qualifier in 1873 and graduated in 1875. He graduated from the LycГ©e in 1871 with a baccalaurГ©at in both letters and sciences.Дuring the Franco-Prussian War of 1870, he served alongside his father in the Ambulance Corps. However, poor eyesight and a tendency towards absentmindedness may explain these difficulties. His poorest subjects were music and physical education, where he was described as 'average at best'. His mathematics teacher described him as a 'monster of mathematics' and he won first prizes in the concours gГ©nГ©ral, a competition between the top pupils from all the LycГ©es across France. He spent eleven years at the LycГ©e and during this time he proved to be one of the top students in every topic he studied. In 1862, Henri entered the LycГ©e in Nancy (now renamed the LycГ©e Henri-PoincarГ© in his honour, along with Henri PoincarГ© University, also in Nancy). Plaque on the birthplace of Henri PoincarГ© at house number 117 on the Grande Rue in the city of NancyДuring his childhood he was seriously ill for a time with diphtheria and received special instruction from his mother, EugГ©nie Launois (1830вЂ“1897). Another notable member of Henri's family was his cousin, Raymond PoincarГ©, a fellow member of the AcadГ©mie franГ§aise, who would serve as President of France from 1913 to 1920. His younger sister Aline married the spiritual philosopher Г‰mile Boutroux. His father LГ©on PoincarГ© (1828вЂ“1892) was a professor of medicine at the University of Nancy. PoincarГ© was born on 29 April 1854 in CitГ© Ducale neighborhood, Nancy, Meurthe-et-Moselle, into an influential French family.

10.1 Secondary sources to work on relativity.

7.1 PoincarГ©'s writings in English translation.

2.7 Differential equations and mathematical physics.

2.3.6 Assessments on PoincarГ© and relativity.

2.3.2 Principle of relativity and Lorentz transformations.

The PoincarГ© group used in physics and mathematics was named after him.Д®arly in the 20th century he formulated the PoincarГ© conjecture that became over time one of the famous unsolved problems in mathematics until it was solved in 2002вЂ“2003 by Grigori Perelman. In 1905, PoincarГ© first proposed gravitational waves ( ondes gravifiques) emanating from a body and propagating at the speed of light as being required by the Lorentz transformations. Thus he obtained perfect invariance of all of Maxwell's equations, an important step in the formulation of the theory of special relativity.

PoincarГ© discovered the remaining relativistic velocity transformations and recorded them in a letter to Hendrik Lorentz in 1905. PoincarГ© made clear the importance of paying attention to the invariance of laws of physics under different transformations, and was the first to present the Lorentz transformations in their modern symmetrical form. He is also considered to be one of the founders of the field of topology. In his research on the three-body problem, PoincarГ© became the first person to discover a chaotic deterministic system which laid the foundations of modern chaos theory. He is often described as a polymath, and in mathematics as 'The Last Universalist', since he excelled in all fields of the discipline as it existed during his lifetime.ДЄs a mathematician and physicist, he made many original fundamental contributions to pure and applied mathematics, mathematical physics, and celestial mechanics. Jules Henri PoincarГ© ( UK: / Л€ p w Г¦Мѓ k Й‘Лђr eЙЄ/, French: ( listen) 29 April 1854В вЂ“ 17 July 1912) was a French mathematician, theoretical physicist, engineer, and philosopher of science.

Raymond point carrГ©