### The atomic HF calculation of He

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

System.CurrentDirectory    ./
System.Name                 He
<<< Calculation type >>>
eq.type                     sch
calc.type                   FEMHF
xc.type                     HF
<<< Atom >>>
AtomSpecies                 2
max.ocupied.N               1
total.electron              2.0000
valence.electron            2.0000

grid.xmax                  10.000    # rmax=xmax^2
grid.num                    566
<<< SCF >>>
scf.maxIter                 50
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         -0.917955562856068

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

Etot   =       -2.861679995610951
Etot   = Ekin + EHart + Exc + Eec

Ekin   =        2.861679995607090
EHart  =        2.051537739797630
Eec    =       -6.749128861116856
Exc    =       -1.025768869898815

Exc    = Ex + Ecorr = (Ex-Ekin_x) + (Ecorr-Ekin_c) + Ekin_x + Ekin_c
Ex     =       -1.025768869898815
Ecorr  =        0.000000000000000
Ekin_x =        0.000000000000000
Ekin_c =        0.000000000000000

Eeigen =       -1.835911125712136

Virial theorem  2*(Ekin+Ekin_x+Ekin_c)+(EHart+Eec+Exc-Ekin_x-Ekin_c) = -0.000000000003861
Virial theorem (EHart+Eec+Exc-Ekin_x-Ekin_c)/(Ekin+Ekin_x+Ekin_c)    = -2.000000000001349
```