Set: pp::colors
  Set: pp::unicode
  Assumed: f
∀ a : ℤ, (f a a) > 0
∀ a b : ℤ, (f a b) > 0
  Assumed: g
∀ (a : ℤ) (b : ℝ), (g a b) > 0
∀ a b : ℤ, (g a (f a b)) > 0
  Set: lean::pp::coercion
∀ a b : ℤ, (g a (int_to_real (f a b))) > (nat_to_int 0)
λ a : ℕ, a + 1
Error (line: 10, pos: 18) ambiguous overloads
Candidates:
    Real::add : ℝ → ℝ → ℝ
    Int::add : ℤ → ℤ → ℤ
    Nat::add : ℕ → ℕ → ℕ
Arguments:
    a : ?M0
    b : ?M2[lower:2:2 lift:0:1 subst:0 a]
λ a b c : ℤ, a + c + b
Error (line: 17, pos: 19) ambiguous overloads
Candidates:
    Real::add : ℝ → ℝ → ℝ
    Int::add : ℤ → ℤ → ℤ
    Nat::add : ℕ → ℕ → ℕ
Arguments:
    a : ?M0
    b : ?M2[lower:2:2 lift:0:1 subst:0 a]
  Assumed: x
λ a b : ℤ, a + x + b