Joseph Saurin
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Joseph Saurin
Joseph Saurin (1 September 1659, in Courthézon – 29 December 1737, in Paris) was a French mathematician and a converted Protestant minister. He was the first to show how the tangents at the multiple points of curves could be determined by mathematical analysis. He was accused in 1712 by Jean-Baptiste Rousseau of being the actual author of defamatory verses that gossip had attributed to Rousseau. He was the father of Bernard-Joseph Saurin. Bibliography

* Samuel Baur: ''Neues Historisch-Biographisch-Literarisches Handwörterbuch der größten Personen aller Zeiten''. 4th ed., Stettinische Buchhhandlung, Ulm 1809, p. 860 1659 births 1737 deaths 17th-century French mathematicians 18th-century French mathematicians Members of the French Academy of Sciences {{france-mathematician-stub ...
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Courthézon
Courthézon (; oc, Corteson) is a commune in the Vaucluse department in the Provence-Alpes-Côte d'Azur region in southeastern France. Population See also *Communes of the Vaucluse department The following is a list of the 151 communes of the Vaucluse department of France. The communes cooperate in the following intercommunalities (as of 2022):Communes of Vaucluse {{Vaucluse-geo-stub ...
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Paris
Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, fashion, gastronomy, and science. For its leading role in the arts and sciences, as well as its very early system of street lighting, in the 19th century it became known as "the City of Light". Like London, prior to the Second World War, it was also sometimes called the capital of the world. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an estimated population of 12,262,544 in 2019, or about 19% of the population of France, making the region France's primate city. The Paris Region had a GDP of €739 billion ($743 billion) in 2019, which is the highest in Europe. According to the Economist Intelli ...
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Mathematician
A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History One of the earliest known mathematicians were Thales of Miletus (c. 624–c.546 BC); he has been hailed as the first true mathematician and the first known individual to whom a mathematical discovery has been attributed. He is credited with the first use of deductive reasoning applied to geometry, by deriving four corollaries to Thales' Theorem. The number of known mathematicians grew when Pythagoras of Samos (c. 582–c. 507 BC) established the Pythagorean School, whose doctrine it was that mathematics ruled the universe and whose motto was "All is number". It was the Pythagoreans who coined the term "mathematics", and with whom the study of mathematics for its own sake begins. The first woman mathematician recorded by history was Hypati ...
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Tangent
In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point. Leibniz defined it as the line through a pair of infinitely close points on the curve. More precisely, a straight line is said to be a tangent of a curve at a point if the line passes through the point on the curve and has slope , where ''f'' is the derivative of ''f''. A similar definition applies to space curves and curves in ''n''-dimensional Euclidean space. As it passes through the point where the tangent line and the curve meet, called the point of tangency, the tangent line is "going in the same direction" as the curve, and is thus the best straight-line approximation to the curve at that point. The tangent line to a point on a differentiable curve can also be thought of as a '' tangent line approximation'', the graph of the affine function that best approximates the original function at the given point. Similarly, t ...
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Curve
In mathematics, a curve (also called a curved line in older texts) is an object similar to a line (geometry), line, but that does not have to be Linearity, straight. Intuitively, a curve may be thought of as the trace left by a moving point (geometry), point. This is the definition that appeared more than 2000 years ago in Euclid's Elements, Euclid's ''Elements'': "The [curved] line is […] the first species of quantity, which has only one dimension, namely length, without any width nor depth, and is nothing else than the flow or run of the point which […] will leave from its imaginary moving some vestige in length, exempt of any width." This definition of a curve has been formalized in modern mathematics as: ''A curve is the image (mathematics), image of an interval (mathematics), interval to a topological space by a continuous function''. In some contexts, the function that defines the curve is called a ''parametrization'', and the curve is a parametric curve. In this artic ...
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Mathematical Analysis
Analysis is the branch of mathematics dealing with continuous functions, limit (mathematics), limits, and related theories, such as Derivative, differentiation, Integral, integration, measure (mathematics), measure, infinite sequences, series (mathematics), series, and analytic functions. These theories are usually studied in the context of Real number, real and Complex number, complex numbers and Function (mathematics), functions. Analysis evolved from calculus, which involves the elementary concepts and techniques of analysis. Analysis may be distinguished from geometry; however, it can be applied to any Space (mathematics), space of mathematical objects that has a definition of nearness (a topological space) or specific distances between objects (a metric space). History Ancient Mathematical analysis formally developed in the 17th century during the Scientific Revolution, but many of its ideas can be traced back to earlier mathematicians. Early results in analysis were i ...
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Jean-Baptiste Rousseau
Jean-Baptiste Rousseau (6 April 1671 – 17 March 1741) was a French playwright and poet, particularly noted for his cynical epigrams. Biography Rousseau was born in Paris, the son of a shoemaker, and was well educated. As a young man, he gained favour with Boileau, who encouraged him to write. Rousseau began with the theatre, for which he had no aptitude. A one-act comedy, ''Le Café'', failed in 1694, and he was not much happier with a more ambitious play, ''Le Flatteur'' (1696), or with the opera ''Venus et Adonis'' (1697). In 1700 he tried another comedy, ''Le Capricieux'', which had the same fate. He then went with Tallard as an attaché to London, and, in days when literature still led to high position, seemed likely to achieve success. His misfortunes began with a club squabble at the Café Laurent, which was much frequented by literary men, and where he indulged in lampoons on his companions. A shower of libellous and sometimes obscene verses was written by or attribu ...
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Bernard-Joseph Saurin
Bernard-Joseph Saurin (1706 in Paris – 17 November 1781 in Paris) was a lawyer, poet, and playwright. Biography Saurin was the son of Joseph Saurin, a converted Protestant minister and mathematician who had been accused in 1712 by Jean-Baptiste Rousseau of being the actual author of defamatory verses that gossip had attributed to Rousseau.Rousseau was prosecuted for defamation of character and condemned to perpetual exile. Attracted to literature, and frequenting the Society of the Caveau, he became a lawyer at Parliament, a career which he did not like, but endured for fifteen years in order to support his family. His professional life in the theatre began when he was forty. Neither his comedy ''Les Trois rivaux'' (''The Three Rivals''), nor his tragedy ''Aménophis'' met with success, which came in 1760 with the tragedy ''Spartacus'' and the comedy ''Les Mœurs du temps'' (''The Manners of the Time''), which were applauded at the Comédie-Française. In the following yea ...
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1659 Births
Events January–March * January 14 – In the Battle of the Lines of Elvas, fought near the small city of Elvas in Portugal during the Portuguese Restoration War, the Spanish Army under the command of Luis Méndez de Haro suffers heavy casualties, with over 11,000 of its nearly 16,000 soldiers killed, wounded or taken prisoner; the smaller Portuguese force of 10,500 troops, commanded by André de Albuquerque Ribafria (who is killed in the battle) suffers less than 900 casualties. * January 24 – Pierre Corneille's ''Oedipe'' premieres in Paris. * January 27 – The third and final session of the Parliament of the Commonwealth of England, Scotland and Ireland is opened by Lord Protector Richard Cromwell, with Chaloner Chute as the Speaker of the House of Commons, with 567 members. "Cromwell's Other House", which replaced the House of Lords during the last years of the Protectorate, opens on the same day, with Richard Cromwell as its speaker. * Jan ...
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1737 Deaths
Events January–March * January 5 – Spain and the Holy Roman Empire sign instruments of cession at Pontremoli in the Grand Duchy of Tuscany in Italy, with the Empire receiving control of Tuscany and the Grand Duchy of Parma and Piacenza, in return for Don Carlos of Spain being recognized as King of Naples and King of Sicily. * January 9 – The Empires of Austria and Russia enter into a secret military alliance that leads to Austria's disastrous entry into the Russo-Turkish War. * January 18 – In Manila, a peace treaty is signed between Spain's Governor-General of the Philippines, Fernándo Valdés y Tamon, and the Sultan Azim ud-Din I of Sulu, recognizing Azim's authority over the islands of the Sulu Archipelago. * February 20 – France's Foreign Minister, Germain Louis Chauvelin, is dismissed by King Louis XV's Chief Minister, Cardinal André-Hercule de Fleury * February 27 – French scientists Henri-Louis Duhamel du Monceau and Geo ...
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17th-century French Mathematicians
The 17th century lasted from January 1, 1601 ( MDCI), to December 31, 1700 ( MDCC). It falls into the early modern period of Europe and in that continent (whose impact on the world was increasing) was characterized by the Baroque cultural movement, the latter part of the Spanish Golden Age, the Dutch Golden Age, the French ''Grand Siècle'' dominated by Louis XIV, the Scientific Revolution, the world's first public company and megacorporation known as the Dutch East India Company, and according to some historians, the General Crisis. From the mid-17th century, European politics were increasingly dominated by the Kingdom of France of Louis XIV, where royal power was solidified domestically in the civil war of the Fronde. The semi-feudal territorial French nobility was weakened and subjugated to the power of an absolute monarchy through the reinvention of the Palace of Versailles from a hunting lodge to a gilded prison, in which a greatly expanded royal court could be more easily k ...
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18th-century French Mathematicians
The 18th century lasted from January 1, 1701 ( MDCCI) to December 31, 1800 ( MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian Revolutions. During the century, slave trading and human trafficking expanded across the shores of the Atlantic, while declining in Russia, China, and Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in human society and the environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revolution, with an emphasis on directly interconnected events. To historians who expand ...
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