Heinz-Otto Kreiss (14 September 1930 – 16 December 2015) was a German mathematician in the fields of numerical analysis, applied mathematics, and what was the new area of computing in the early 1960s.
Over the course of his long career, Kreiss wrote a number of books in addition to the purely academic journal articles he authored across several disciplines.
In 1974, he delivered a plenary lecture Initial Boundary Value Problems for Hyperbolic Partial Differential Equations at the International Congress of Mathematicians (ICM) in Vancouver.
In 2002 he won the National Academy of Sciences Award in Numerical Analysis and Applied Mathematics.
[2] In 2003 he was the John von Neumann Lecturer of the Society for Industrial and Applied Mathematics (SIAM).