| eq-entry(n, lref) ∈ q0, ∀ n, lref, lref0. eq-entry(n, lref) ∈ q0 → lref = lref0 ∨ (∃ n. eq-entry(n, lref) ∈ q0 - lref0), eq-entry(n, lref) = eq-entry(m, lref1) ∨ eq-entry(n, lref) ∈ q0 ⊦ lref = lref0, ∃ n0. eq-entry(n0, lref) ∈ (lref1 = lref0 ⊃ q0 - lref0;eq-entry(m, lref1) ' + (q0 - lref0)) |
eq-entry(n, lref) ∈ q0, ∀ n, lref, lref0. eq-entry(n, lref) ∈ q0 → lref = lref0 ∨ (∃ n. eq-entry(n, lref) ∈ q0 - lref0) ⊦ lref = lref0, ∃ n0. eq-entry(n0, lref) ∈ (lref1 = lref0 ⊃ q0 - lref0;eq-entry(m, lref1) ' + (q0 - lref0))