  The elastic and transport coefficients of a perfect face-centered cubic
crystal of hard spheres are computed from the poles of the dynamic structure
factor and of the spectral functions of transverse momentum density
fluctuations. For such crystals, the relevant coefficients are the three
isothermal elastic constants $(C_{11}^T,C_{12}^T,C_{44}^T)$, the heat
conductivity $\kappa$, and the three viscosities
$(\eta_{11},\eta_{12},\eta_{44})$ (in Voigt's notations), which are directly
computed using molecular dynamics simulations. The elastic and transport
coefficients are then compared to the values of the same coefficients obtained
with the method of Helfand moments, showing good agreement and providing strong
support for the microscopic hydrodynamic theory of perfect crystals based on
the local-equilibrium approach.
