  Using a set of high-resolution dark matter only cosmological simulations we
found a correlation between the dark matter halo mass M and its spin parameter
lambda for objects forming at redshifts z > 10: the spin parameter decreases
with increasing mass. However, halos forming at later times do not exhibit such
a strong correlation, in agreement with the findings of previous studies. While
we presented such a correlation in a previous study using the Bullock et al.
(2001) spin parameter defintion we now defer to the classical definition
showing that the results are independent of the definition.
