### The atomic HF calculation of Ar

```***************************************************
Input file
***************************************************

System.CurrentDirectory    ./
System.Name                 Ar
<<< Calculation type >>>
eq.type                     sch
calc.type                   FEMHF
xc.type                     HF
<<< Atom >>>
AtomSpecies                 18
max.ocupied.N               3
total.electron              18.0000
valence.electron            8.0000

grid.xmax                  10.000    # rmax=xmax^2
grid.num                    1697
<<< SCF >>>
scf.maxIter                 40
scf.Mixing.Type             Pulay
scf.Init.Mixing.Weight      0.10000
scf.Min.Mixing.Weight       0.00100
scf.Max.Mixing.Weight       0.80000
scf.criterion               1.000e-30

*******************************************************
Eigenvalues (Hartree) in the all electron calculation
*******************************************************

n=  1  l=  0       -118.610350556326063
n=  2  l=  0        -12.322153309156654
n=  2  l=  1         -9.571465560549270
n=  3  l=  0         -1.277353024615558
n=  3  l=  1         -0.591017409350503

*******************************************************
Energies (Hartree) in the all electron calculation
*******************************************************

Etot   =     -526.817512802496315
Etot   = Ekin + EHart + Exc + Eec

Ekin   =      526.817512801815597
EHart  =      231.607843190184991
Eec    =    -1255.057926807213004
Exc    =      -30.184941987283899

Exc    = Ex + Ecorr = (Ex-Ekin_x) + (Ecorr-Ekin_c) + Ekin_x + Ekin_c
Ex     =      -30.184941987283899
Ecorr  =        0.000000000000000
Ekin_x =        0.000000000000000
Ekin_c =        0.000000000000000

Eeigen =     -325.394611599595189

Virial theorem  2*(Ekin+Ekin_x+Ekin_c)+(EHart+Eec+Exc-Ekin_x-Ekin_c) = -0.000000000680718
Virial theorem (EHart+Eec+Exc-Ekin_x-Ekin_c)/(Ekin+Ekin_x+Ekin_c)    = -2.000000000001292
```