Simon White has a towering reputation in the area of N-body simulations
of hierarchical cosmology, namely the study of the formation of large
scale structures as well as individual massive haloes and galaxies in
the expanding Universe. The N-body simulations conducted by White since
the early 70s have always been state-of-the-art, ranging from N=250, in
the very earliest days, to N=10 billion recently. White has used these
simulations with skill to extract what is interesting and essential,
ranging from the early demonstration of a clustering hierarchy, through
the development of the basic ideas and successes of cold dark matter,
to the NFW "universal" halo density profile (Navarro, Frenk & White).
Of this last achievement, Tremaine writes "White is probably the leading
contributor to this solution". These achievements are the highlights of
many, broad, dynamical results. In addition, as a senior cosmologist,
he has been a prolific and successful mentor of good students and
post-docs, many of whom are today notable dynamicists in their own right.
![[DDA]](../ddalogoi.gif)