| rs1 ∩ rs0 = ∅, R[rs0, f, g(r; a1)], a1[r => o][rs1, f, g(r; a1)] ⊦ (g(r)[r => o] * R)[rs1 ∪ rs0, f, g], g(r)[r => o][rs1, f, g] ∧ R[rs0, f, g] ∧ rs1 ∩ rs0 = ∅ |
rs1 ∩ rs0 = ∅, a1[r => o][rs1, f, g(r; a1)], R[rs0, f, g(r; a1)] ⊦ (g(r)[r => o] * R)[rs1 ∪ rs0, f, g], g(r)[r => o][rs1, f, g] ∧ R[rs0, f, g]