  CO$N$CEPT (COsmological $N$-body CodE in PyThon) is a free and open-source
code for cosmological $N$-body simulations on massively parallel computers with
distributed memory. Collisionless dark matter is the only implemented particle
species. Gravity can be computed using the PP, PM or the P$^{3}$M algorithm.
The goal of CO$N$CEPT is to make it pleasant to work with cosmological $N$-body
simulations - for the cosmologist as well as for the source code developer.
  This is the user guide. The source code and additional documentation can be
found at https://github.com/jmd-dk/concept/
