Monday, 07/24: Writing a pm-code - AIP

Model equations 16
The quantities with subscript zero are the units in which corresponding
physical variables are measured. The unit of length, r 0 , is an arbitrary scale. I
will chose r 0 to be the size of the PM grid cell:
r 0 = L box
N g
;
N 3 g = total number of grid cells
the rest of the units are defined as
t 0 ≡ H −1
0 ,
v 0 ≡ r 0
t 0
,
ρ 0 ≡ 3H2 0
8πG Ω m,0,
φ 0 ≡ r2 0
t 2 0
= v 2 0.