⊦ R[rs, f, g] ↔ R(mk(rs, f, g))
⊦ bv ∧ (∀ r. r ∈ rs → g(r) = a) ∧ mk(rs, f, g) = ∅ ↔ ((⌜bv⌝ ∧ emp))(mk(rs, f, g))
Used terms: g, f, rs, ⌜bv⌝ ∧ emp