Brosl Hasslacher was an American physicist and computer scientist. He did his Ph.D. with D.Z. Freeman and C.N. Yang in SUNY, Stony Brook. After having several postdoctoral and research positions at IAS in Princeton, Caltech, ENS in Paris, and CERN, he settled for more that twenty years at the Theoretical Physics Division of the Los Alamos National Laboratory, where he was involved in theoretical, experimental, and numerical work in high-energy physics.
Brosl had strong links with the French physics community. In the 1970s, he published a number of seminal papers with A. Neveu on extended hadron models and in the 1980s, with U. Frisch and Y. Pomeau on lattice-gas hydrodynamics.
Brosl visited the Observatory often and spent much time in Nice. He actively participated in the first Nonlinear Cosmology Program in 2003. It is extremely sad that his premature death in November 2005 made impossible his immediate presence at the present workshop.