| r0 ∈ rs1 ↔ r0 = r, cf(r) = a × r0, rs1 ∩ rs0 = ∅, R[rs0, cf, af], r1 ∈ rs1, r0 = r → a × r = ce, ∀ r2. (r2 ∈ rs1 ↔ r2 = r) ∧ (r2 ∈ rs1 → cf(r2) = (r2 = r ⊃ ce;(∅ ++ r)[r2])), ∀ r. r ∈ rs1 → af(r) = o ⊦ # rs1 = 0, cf(r1) = (∅ ++ r)[r1], r = null, r1 = r, rs1 = ∅, (o[r => a × r0] * R)[rs1 ∪ rs0, cf, af] |
Used terms: r1