Carl Jacobi

Lejeune Dirichlet and the Mathematical Function

Lejeune Dirichlet and the Mathematical Function

On February 13, 1805, German mathematician Johann Peter Gustav Lejeune Dirichlet was born. Dirichlet is best known for his papers on conditions for the convergence of trigonometric series and the use of the series to represent arbitrary functions. He also proposed in 1837 the modern definition of a mathematical function. “In mathematics as in other fields, to find one self lost in wonder at some manifestation is frequently the half of a new discovery.”…
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Only the Good Die Young – the Very Short Life of Évariste Galois

Only the Good Die Young – the Very Short Life of Évariste Galois

On June 1st, 1832, French mathematician Évariste Galois was killed in a duel. He was only 20 years of age. He left an elaborate manuscript three years earlier, in which he established that an algebraic equation is solvable by radicals, if and only if the group of permutations of its roots has a certain structure, thereby solving a problem standing for 350 years. But why did he have to die so young? Just because…
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Karl Weierstrass – the Father of Modern Analysis

Karl Weierstrass – the Father of Modern Analysis

On February 19, 1897, German mathematician Karl Theodor Wilhelm Weierstrass passed away. Weierstrass often is cited as the “father of modern analysis“. He formalized the definition of the continuity of a function, proved the intermediate value theorem and the Bolzano–Weierstrass theorem, and used the latter to study the properties of continuous functions on closed bounded intervals. “… it is true that a mathematician who is not somewhat of a poet, will never be a…
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Carl Jacobi and the Elliptic Functions

Carl Jacobi and the Elliptic Functions

On December 10, 1804, German mathematician Carl Gustav Jacob Jacobi was born. He made fundamental contributions to elliptic functions, dynamics, differential equations, and number theory.   Carl Jacobi was the son of a banker and grew up in a rather wealthy family. His brother, Moritz Jacobi became a famous physicist. Carl received his early education from his mother and entered the Gymnasium in Potsdam at about 12 years. However, his previous education was…
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