Karl Theodor Wilhelm Weierstraß (October 31, 1815 - February 19, 1897) was a German mathematician who is oft cited as the "father of modern analysis". (The letter ß may be transliterated as ss; one often writes Weierstrass.) He was born in Ostenfelde, Westphalia (today Germany) and died in Berlin, Germany.

See also

• Bolzano-Weierstrass theorem
  • Heine-Borel theorem
• Stone-Weierstrass theorem
• Weierstrass-Casorati theorem
• Weierstrass's elliptic functions
• Weierstrass function
• Weierstrass M-test
• Weierstrass preparation theorem
• Lindemann-Weierstrass theorem