How Large is the Elephant in the Density Functional Theory Room?

Abstract: A paper compares density functional theory results for atomization energies and dipole moments using a multi-wavelet based method with traditional Gaussian basis set results, and concludes that Gaussian basis sets are problematic for achieving high accuracy. We show that by a proper choice of Gaussian basis sets they are capable of achieving essentially the same accuracy as the multi-wavelet approach, and identify a couple of possible problems in the multi-wavelet calculations.