Hans Petter Langtangen (3 January 1962 – 10 October 2016) was a Norwegian scientist trained in mechanics and scientific computing. Langtangen was the director of the Centre for Biomedical Computing, a Norwegian Center of Excellence hosted by Simula Research Laboratory. He was a professor of scientific computing at the University of Oslo, and was editor-in-chief of SIAM Journal on Scientific Computing 2011–2015. Source: Wikipedia (en)