t1=650.
Om0=3.10652
nu=5e-5
eta=5e-5
chit=2.5e-5
nplot=170
lold=1
run='Om3_Pr200_Pm100'
GM=3.
nit=12000
nt0=0
ntu=0
nt=nit
njump=1
Omsol=5
t0=0.