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François Daviet De Foncenex
François Daviet de Foncenex (1734 – 1799) was a Royal Sardinian Army officer and mathematician. Life and work François Daviet de Foncenex was born in Thonon in the Duchy of Savoy in 1734. He studied in the '' Accademia di Torino'' under the professorship of Joseph-Louis Lagrange, who was two years younger than him. In 1759, Daviet was appointed as a member of the ''Accademia delle Scienze di Torino''. He was commissioned as a lieutenant in the Royal Sardinian Army and quickly rose through the ranks. From 1790 to 1792, Daviet served as the governor of Sassari Sassari ( ; ; ; ) is an Italian city and the second-largest of Sardinia in terms of population with 120,497 inhabitants as of 2025, and a functional urban area of about 260,000 inhabitants. One of the oldest cities on the island, it contains ... and Villefranche-sur-Mer. In 1792, he fought against the French Revolutionary Army; he was subsequently convicted of treason and sentenced to imprisonment for one ...
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Thonon-les-Bains
Thonon-les-Bains (; ), often simply referred to as Thonon, is a subprefecture of the Haute-Savoie department in the Auvergne-Rhône-Alpes region in Eastern France. In 2018, the commune had a population of 35,241. Thonon-les-Bains is part of a transborder metropolitan area known as Grand Genève. It is situated on the shores of Lake Geneva (, or simply ). History Thonon-les-Bains was the historic capital of Chablais, a province of the old Duchy of Savoy. The Chablais Savoyard is the portion of Chablais in France. Chablais Valaisan and Chablais Vaudois are those portions of Chablais in the adjacent Switzerland cantons Valais and Vaud.(cite: Chablais Wikipedia) The town was the capital of the Dukedom of Chablais. During the debates on the future of the Duchy of Savoy in 1860, the population was sensitive to the idea of a union of the northern part of the duchy with Switzerland. A petition circulated in this part of the country ( Chablais, Faucigny, Northern Genevois), but i ...
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Lieutenant
A lieutenant ( , ; abbreviated Lt., Lt, LT, Lieut and similar) is a Junior officer, junior commissioned officer rank in the armed forces of many nations, as well as fire services, emergency medical services, Security agency, security services and police forces. The rank in armies and air forces is often subdivided into subcategories of seniority. In Comparative navy officer ranks of Anglophone countries, English-speaking navies, lieutenants are often equivalent to the army rank of Captain (armed forces), captain; in other navies, the lieutenants are usually equal to their army counterparts. ''Lieutenant'' may also appear as part of a title used in various other organisations with a codified command structure. It often designates someone who is "second-in-command", and as such, may precede the name of the rank directly above it. For example, a "lieutenant master" is likely to be second-in-command to the "master" in an organisation using both ranks. Political uses include lieu ...
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18th-century Italian Mathematicians
The 18th century lasted from 1 January 1701 (represented by the Roman numerals MDCCI) to 31 December 1800 (MDCCC). During the 18th century, elements of Age of Enlightenment, Enlightenment thinking culminated in the Atlantic Revolutions. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures. The Industrial Revolution began mid-century, leading to radical changes in Society, human society and the Natural environment, environment. The European colonization of the Americas and other parts of the world intensified and associated mass migrations of people grew in size as part of the Age of Sail. During the century, History of slavery, slave trading expanded across the shores of the Atlantic Ocean, while declining in Russian Empire, Russia and Qing dynasty, China. Western world, 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� ...
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1799 Deaths
Events January–March * January 9 – British Prime Minister William Pitt the Younger introduces an income tax of two shillings to the pound, to raise funds for Great Britain's war effort in the French Revolutionary Wars. * January 17 – Maltese patriot Dun Mikiel Xerri, along with a number of other patriots, is executed. * January 21 – The Parthenopean Republic is established in Naples by French General Jean Étienne Championnet; King Ferdinand I of the Two Sicilies flees. * January 27 – French Revolutionary Wars: Macau Incident – French and Spanish warships encounter a British Royal Navy escort squadron in the Wanshan Archipelago of China inconclusively. * February 9 – Quasi-War: In the single-ship action of USS ''Constellation'' vs ''L'Insurgente'' in the Caribbean, the American ship is the victor. * February 28 – French Revolutionary Wars: Action of 28 February 1799 – British Royal Navy frigate HMS ''Sybille'' defeats the French frigate ''Forte' ...
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1734 Births
Events January– March * January 8 – Salzburgers, Lutherans who were expelled by the Roman Catholic Bishop of Salzburg, Austria, in October 1731, set sail for the British Colony of Georgia in America. * February 16 – The Ostend Company, established in 1722 in the Austrian Netherlands (modern-day Belgium) to compete for trade in the West Indies (the Caribbean islands) and the East Indies (south and southeast Asia), ceases business as part of the agreement by Austria in the Second Treaty of Vienna. * March 12 – Salzburgers arrive at the mouth of the Savannah River in the British Colony of Georgia. April–June * April 25 – Easter occurs on the latest possible date (the next time is in 1886). * May 15 – Prince Charles of Spain (later King Charles III) becomes the new King of Naples and Sicily, five days after his arrival in Naples. * May 25 – Spanish forces under the command of José Carrillo de Albornoz, 1st Duke of ...
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Imaginary Numbers
An imaginary number is the product of a real number and the imaginary unit , is usually used in engineering contexts where has other meanings (such as electrical current) which is defined by its property . The square of an imaginary number is . For example, is an imaginary number, and its square is . The number zero is considered to be both real and imaginary. Originally coined in the 17th century by René Descartes as a derogatory term and regarded as fictitious or useless, the concept gained wide acceptance following the work of Leonhard Euler (in the 18th century) and Augustin-Louis Cauchy and Carl Friedrich Gauss (in the early 19th century). An imaginary number can be added to a real number to form a complex number of the form , where the real numbers and are called, respectively, the ''real part'' and the ''imaginary part'' of the complex number. History Although the Greek mathematician and engineer Heron of Alexandria is noted as the first to present a calculat ...
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French Revolutionary Army
The French Revolutionary Army () was the French land force that fought the French Revolutionary Wars from 1792 to 1802. In the beginning, the French armies were characterised by their revolutionary fervour, their poor equipment and their great numbers. However, the French Revolutionary Army had become arguably the most powerful army in the world by the mid-1790s, as the French armies had become well-experienced and organized, enabling them to comfortably outfight their enemies. Despite experiencing early disastrous defeats, the revolutionary armies successfully expelled foreign forces from French soil and then overran many neighboring countries, establishing client republics. Leading generals included Napoleon Bonaparte, Jean-Baptiste Jourdan, André Masséna, Jean Victor Marie Moreau and Étienne Macdonald. As a general description of French military forces during this period, it should not be confused with the "revolutionary armies" (''armées révolutionnaires'') which we ...
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Villefranche-sur-Mer
Villefranche-sur-Mer (, ; ; ) is a resort town in the Alpes-Maritimes department in the Provence-Alpes-Côte d'Azur region on the French Riviera and is located southwest of the Principality of Monaco, which is just west of the French-Italian border. Geography Villefranche-sur-Mer is immediately to the east of the city of Nice, along Mont Boron, Mont Alban and Mont Vinaigrier, and southwest of Monaco. The bay ('' rade'') of Villefranche is one of the deepest natural harbours of any port in the Mediterranean Sea and provides safe anchorage for large ships from easterly winds. Reaching depths of between the Cape of Nice and Cap Ferrat, it extends to the south to form a abyss known as the undersea Canyon of Villefranche about off the coastline. The Bay is the place where the United States Sixth Fleet moors when cruising the Mediterranean coast. The city limits extend to the hills surrounding the bay climbing from sea level to an altitude of , the highest point of Mont-Leuz ...
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Sassari
Sassari ( ; ; ; ) is an Italian city and the second-largest of Sardinia in terms of population with 120,497 inhabitants as of 2025, and a functional urban area of about 260,000 inhabitants. One of the oldest cities on the island, it contains a considerable collection of art. Since its origins at the turn of the 12th century, Sassari has been ruled by the Giudicato of Torres, the Pisans, as an independent republic in alliance with Republic of Genoa, Genoa, by the Crown of Aragon, Aragonese and the Spain, Spanish, all of whom have contributed to Sassari's historical and artistic heritage. Sassari is a city rich in art, culture and history, and is well known for its palazzo, palazzi, the Fountain of the Rosello, and its elegant neoclassical architecture, such as Piazza d'Italia (Italy Square) and the Teatro Civico (Civic Theatre). As Sardinia's second most populated city, it has a considerable amount of cultural, touristic, commercial and political importance in the island. The ...
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Joseph-Louis Lagrange
Joseph-Louis Lagrange (born Giuseppe Luigi LagrangiaJoseph-Louis Lagrange, comte de l’Empire
''Encyclopædia Britannica''
or Giuseppe Ludovico De la Grange Tournier; 25 January 1736 – 10 April 1813), also reported as Giuseppe Luigi Lagrange or Lagrangia, was an Italian and naturalized French mathematician, physicist and astronomer. He made significant contributions to the fields of mathematical analysis, analysis, number theory, and both classical mechanics, classical and celestial mechanics. In 1766, on the recommendation of Leonhard Euler and Jean le Rond d'Alembert, d'Alembert, Lagrange succeeded Euler as the director of mathematics at the Prussian Academy of Sciences in Berlin, Prussia, where he stayed for over twenty y ...
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Duchy Of Savoy
The Duchy of Savoy (; ) was a territorial entity of the Savoyard state that existed from 1416 until 1847 and was a possession of the House of Savoy. It was created when Sigismund, Holy Roman Emperor, raised the County of Savoy into a duchy for Amadeus VIII. The duchy was an Imperial fief, subject of the Holy Roman Empire, until 1792, with a vote in the Imperial Diet. From the 16th century, Savoy belonged to the Upper Rhenish Circle. Its territory included the current French departments of Savoie, Haute-Savoie, and the Alpes-Maritimes, the current Italian region of Aosta Valley, a large part of Piedmont and the County of Geneva in Switzerland, which was then lost to the Old Swiss Confederacy. The main Vulgar languages that were spoken within the Duchy of Savoy were Piedmontese and Arpitan. Terminology The Duchy of Savoy was the central and most prominent of the territories possessed by the House of Savoy, and hence this title was and still is used often to indicate th ...
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Accademia Di Torino
Accademia (Italian for "academy") often refers to: * The Galleria dell'Accademia, an art museum in Florence * The Gallerie dell'Accademia, an art museum in Venice Accademia may also refer to: Academies of art * The Accademia Carrara di Belle Arti di Bergamo, an art school and museum in Bergamo * The Accademia di Architettura di Mendrisio, a Swiss school of architecture * The Accademia di Belle Arti di Bari, an art school in Bari * The Accademia di Belle Arti di Bologna, also known as the Accademia Clementina * The Accademia di Belle Arti di Carrara, an art school in Carrara * The Accademia di Belle Arti di Firenze, an art school in Florence * The Accademia di Belle Arti di Milano "Brera" or Brera Academy, an art school in Milan * The Accademia di Belle Arti di Napoli, an art school in Naples * The Accademia di Belle Arti di Roma, an art school in Rome * The Accademia di Belle Arti di Torino "Albertina" or Accademia Albertina, an art school in Turin * The Accademia di Belle Art ...
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