Weierstrass , Karl Wilhelm Theodor
(1815–1897) German mathematician
Weierstrass, who was born at Ostenfelde in Germany, spent four years at the University of Bonn studying law to please his father. After abandoning law he trained as a school teacher and spent nearly 15 years teaching at elementary schools in obscure German villages. However, he found time to combine his mathematical researches with his school teaching and in 1854 he attracted considerable favorable attention with a memoir on Abelian functions, which he published in Crelle's journal. The fame this work brought him resulted in his obtaining a post as professor of mathematics at the Royal Polytechnic School in Berlin and he soon moved on to the University of Berlin.
Weierstrass's work on Abelian functions is generally considered to be his finest, but he made numerous other contributions to many other areas of mathematics. He was one of the first to make systematic use in analysis of representations of functions by power series. He was a superb and very influential teacher, an excellent fencer, and, unlike many mathematicians, he intensely disliked music. His work in ‘arithmetizing’ analysis led him into a fierce controversy with the constructivist Leopold Kronecker, who thought that Weierstrass's widespread use of nonconstructive proofs and definitions was unsound.
It is to Weierstrass together with Augustin Cauchy that modern analysis is indebted for its high standards of rigor. Weierstrass gave the first truly rigorous definitions of such fundamental analytical concepts as limit, continuity, differentiability, and convergence. He also did very important work in investigating the precise conditions under which infinite series converged. Tests for convergence that he devised are still in use.

Scientists. . 2011.

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  • Weierstrass,Karl Theodor Wilhelm — Wei·er·strass (vīʹər sträs shträs ), Karl Theodor Wilhelm. 1815 1897. German mathematician. Noted for his contributions to real and complex analysis, he was the first to construct an example of a continuous function that could not be… …   Universalium

  • Weierstrass, Karl (Theodor Wilhelm) — born Oct. 31, 1815, Ostenfelde, Bavaria died Feb. 19, 1897, Berlin German mathematician. He taught principally at the University of Berlin (from 1856). After many years of working in isolation, an article in 1854 initiated a string of important… …   Universalium

  • Weierstrass, Karl (Theodor Wilhelm) — (31 oct. 1815, Ostenfelde, Baviera, Alemania–19 feb. 1897, Berlín). Matemático alemán. Enseñó principalmente en la Universidad de Berlín (desde 1856). Después de muchos años de trabajar aislado, un artículo en 1854 inició una cadena de… …   Enciclopedia Universal

  • Weierstrass — n. family name; Karl Wilhelm Theodor Weierstrass (1815 1897), German Mathematician, developer of the Weierstrass approximation theorem …   English contemporary dictionary

  • Karl Theodor Wilhelm Weierstrass — Karl Weierstrass Karl Weierstrass Karl Theodor Wilhelm Weierstrass Naissance 31 octobre 1815 Ostenfelde (Westphalie) …   Wikipédia en Français

  • Weierstrass — Karl Weierstrass Karl Weierstrass Karl Theodor Wilhelm Weierstrass Naissance 31 octobre 1815 Ostenfelde (Westphalie) …   Wikipédia en Français

  • Karl Weierstrass — Karl Weierstraß Karl Theodor Wilhelm Weierstraß Nacimiento 31 de octubre de 1815 Ostenfelde, Westphalia …   Wikipedia Español

  • Karl Weierstrass — Karl Theodor Wilhelm Weierstrass Naissance 31 octobre 1815 Ostenfelde en Westphalie ( …   Wikipédia en Français

  • Karl Weierstrass — Infobox Scientist name = Karl Weierstrass |300px caption = Karl Theodor Wilhelm Weierstrass (Weierstraß) birth date = birth date|1815|10|31|mf=y birth place = Ostenfelde, Westphalia death date = death date and age|1897|2|19|1815|10|31|mf=y death… …   Wikipedia

  • Karl — /kahrl/, n. a male given name, form of Charles. * * * (as used in expressions) Karl Marx Stadt Abraham Karl Baedeker Karl Baer Karl Ernst knight von Barth Karl Benz Karl Friedrich Böhm Karl Herbert Ernst Karl Frahm Bruch Max Karl August Brugmann… …   Universalium

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