∀[n:ℤ]. (-(r(n)) = r(-n) ∈ ℝ)
{ (Auto THEN (Assert -(r(n)) ∈ ℝ BY Auto) THEN (MemTypeHD (-1) THENA Auto) THEN MemTypeCD THEN Auto) }
1. n : ℤ
2. -(r(n)) = -(r(n)) ∈ (ℕ+ ⟶ ℤ)
3. regular-seq(-(r(n)))
⊢ -(r(n)) = r(-n) ∈ (ℕ+ ⟶ ℤ)