is a fast code to generate catalogues of cosmological dark matter
halos with known mass, position, velocity and merger history.
It is able to reproduce, with very good accuracy, the hierarchical
formation of dark matter halos from a realization of an initial
(linear) density perturbation field, given on a 3D grid.
Its setup is similar to that of a conventional N-body simulation,
but it is based on the powerful Lagrangian Perturbation Theory. It
runs in just a small fraction of the computing time taken by an
equivalent N-body simulation, producing promptly the merging histories
of all halos in the catalog.
Fully parallel version 3.0.1 can be downloaded.
Original V3.0 contained a bug, please upgrade to 3.0.1.