| rs1 ∩ rs0 = ∅, R[rs0, cf, af], xv(x)(mk(rs1, cf)), ∀ r. r ∈ rs1 → af(r) = o ⊦ (o[_∃ xv] * R)[rs1 ∪ rs0, cf, af], o[_∃ xv][rs1, cf, af] |
⊦ R[rs, cf, af] ↔ R(mk(rs, cf, af))
rs1 ∩ rs0 = ∅, R[rs0, cf, af], xv(x)(mk(rs1, cf)), ∀ r. r ∈ rs1 → af(r) = o ⊦ o[_∃ xv](mk(rs1, cf, af)), (o[_∃ xv] * R)[rs1 ∪ rs0, cf, af]
Used terms: af, cf, rs1, o[_∃ xv]