see the "abacus" section, the first is a trivial calculation setting, the second is for ecutwfc itself convergence test, mainly for norm-conserving pseudopotentials. The third is for ultrasoft pseudopotentials with a manually fixed dual value, the last is a direct product test between ecutwfc and ecutrho
see the "abacus" section, the first is a trivial calculation setting, the second is for ecutwfc itself convergence test, mainly for norm-conserving pseudopotentials. The third is for ultrasoft pseudopotentials with a manually fixed dual value, the last is a direct product test between ecutwfc and ecutrho