Joseph-Louis Lagrange

Joseph-Louis Lagrange and the Celestial Mechanics

Joseph-Louis Lagrange and the Celestial Mechanics

On April 10, 1813, Italian mathematician and astronomer Joseph-Louis Lagrange passed away. Lagrange made significant contributions to the fields of analysis, number theory, and both classical and celestial mechanics. Lagrange was born on January 25, 1736 as Giuseppe Ludovico Lagrangia in Turin, previously capital of the duchy of Savoy, but became the capital of the kingdom of Sardinia in 1720. His father was Giuseppe Francesco Lodovico Lagrangia, Treasurer of the Office of…
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Siméon Denis Poisson’s Contributions to Mathematics

Siméon Denis Poisson’s Contributions to Mathematics

On June 21, 1781, French mathematician, geometer, and physicist Siméon Denis Poisson was born. He is known known for his work on definite integrals, advances in Fourier series, electromagnetic theory, and probability, esp. the eponymous Poisson series, the Poisson integral and the Poisson equation from potential theory. His works also included applications to electricity and magnetism, and astronomy. Poisson was born in Pithiviers, Loiret, the son of soldier Siméon Poisson, who after retiring…
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Brook Taylor – Forerunner of Differential Calculus

Brook Taylor – Forerunner of Differential Calculus

Brook Taylor (1685–1731) On August 18, 1685, English mathematician Brook Taylor was born. He is best known for Taylor’s theorem and the Taylor series, a method for expanding functions into infinite series. Brook Taylor was born in Edmonton to John Taylor of Bifrons House, Kent, and Olivia Tempest in 1685. It was the year when King Charles II passed away and his Roman Catholic brother succeeded him as King James II of England, the…
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Sophie Germain and the Chladni Experiment

Sophie Germain and the Chladni Experiment

On June 27, 1831, French mathematician, physicist, and philosopher Marie-Sophie Germain passed away. She is best known for her work in number theory and contributions to the applied mathematics of acoustics and elasticity. Her work on Fermat’s Last Theorem provided a foundation for mathematicians exploring the subject for hundreds of years after. Because of prejudice against her gender, she was unable to make a career out of mathematics, but she worked independently throughout her…
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Augustin-Louis Cauchy and the Rigor of Analysis

Augustin-Louis Cauchy and the Rigor of Analysis

On August 21, 1789, French mathematician Augustin-Louis Cauchy was born. He is considered one of the greatest mathematicians during the nineteenth century. There are 16 concepts and theorems named for Cauchy, more than for any other mathematician. Cauchy was one of the most prolific mathematicians of all times. Cauchy wrote 789 papers, a quantity exceeded only by Euler and Cayley, which brought precision and rigor to mathematics. Actually, Cauchy was one of…
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