Karl Weierstrass

Karl Theodor Wilhelm Weierstrass (German: Weierstraß [ˈvaɪɐʃtʁaːs];[1] 31 October 1815 – 19 February 1897) was a German mathematician often cited as the "father of modern analysis". Despite leaving university without a degree, he studied mathematics and trained as a school teacher, eventually teaching mathematics, physics, botany and gymnastics.[2] He later received an honorary doctorate and became professor of mathematics in Berlin.

Karl Weierstrass
Karl Weierstraß
Born(1815-10-31)31 October 1815
Died19 February 1897(1897-02-19) (aged 81)
Alma mater
Known for
Scientific career
InstitutionsGewerbeinstitut, Friedrich Wilhelm University
Academic advisorsChristoph Gudermann
Doctoral students

Among many other contributions, Weierstrass 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.

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