Thus, the unknown constraint in this experiment is the combined stability filter, with c(x) = 0 for stable compositions and c(x) = 1 otherwise. We frame the problem as a multi-objective optimization with two objectives. The Chimera scalarizing function is used to compute a scalar-valued merit from the pairs of objectives. Specifically, we choose to minimize E g of the materials such that it is within the range 1.25 ± 0.5 eV (relevant range for photovoltaics), and to minimize m * to at most a value of 4. Out of the 111 candidates which passed the stability filter, only 7 simultaneously satisfy both objectives, i.e. have 0.75 eV ≤ E g ≤ 1.75 eV and m * ≤ 4 (∼ 6.3% of the feasible space, or ∼ 0.5% of the initial space).