| st[r -- _type] = st1[r -- _type], st[r -- _length] = st1[r -- _length], r1 ∈ st, r1 ∈ st1, r1 -- sk0 ∈ st, r1 -- sk0 ∈ st1, ∀ r2, sk1. r2 ≠ r → st[r2 -- sk1] = (((r2 = r1 ∧ sk1 = sk0) ⊃ st[r1 -- sk0]; st1[r2 -- sk1])), ∀ rk0. rk0 ∈ st ↔ rk0 ∈ st1 ⊦ sk = sk0, st[r0 -- sk] = st1[r0 -- sk], r0 = r, r = r1 |
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r0, sk)]]