SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Karl Weierstrass. Portrait of Karl Wilhelm Theodor Weierstrass (1815-97), German mathematician. Sent by his father to read law at Bonn University, Weierstrass spent much of his time fencing and studying mathematics. He became a teacher in a small village school, and for 15 years developed a theory that power series could be used as a rigorous basis for mathematical analysis. The quality of a paper he published in 1854 led to university appointments. Weierstrass became a popular lecturer, gave the first rigorous definitions of the fundamental concepts of analysis, investigated power series, and made great contributions to function theory and Abelian functions.
Model release not available. Property release not required.