The accuracy of density functional theory (DFT) calculations is limited by the so called
self-interaction error . The recently proposed Fermi-Löwdin orbital based method
[2,3,4] for self-interaction correction (FLO-SIC) is a unitary invariant and size
extensive approach to overcome this error. The current state of the method as
implemented in the NRLMOL program package is presented and the performance of
FLO-SIC DFT applied to atoms and molecules is discussed. The FLO-SIC method
restores the correct -1/r behaviour together with the atomic infinity limit
for bond dissociation and exhibits the energy derivative discontinuity.
In addition this method delivers a description of the chemical bonding as intuitive as
Lewis theory that may bridge the gap between DFT and chemical intuition.
 J. P. Perdew, A. Zunger, Phys. Rev. B 23, 5048 (1981)
 M. R. Pederson et al., J. Chem. Phys., vol. 140, 121103 (2014)
 M. R. Pederson, J. Chem. Phys., vol. 142, 064112 (2015)
 T. Hahn et. al., J. Chem. Phys., vol- 143, 224104 (2015)