Table 1. The training and testing set MAE of the KRR regression models and the linear regression models for the formation energy (E_f) and bandgap energy (E_bg).

The score for the bilinear model using the measure used in the NOMAD competition is 0.079 and 0.020 for the E_bg and E_f, respectively.

	MAE (eV per cation)
	E f		E bg
Model	Train	Test	Train	Test
KRR	0.011	0.015	0.088	0.107
Linear	0.022	0.022	0.143	0.143
Bilinear	0.013	0.015	0.085	0.105