| f(S0)(x), S0 ⊆ S ⊦ (m = 0 ⊃ S0;S) ⊆ (n = 0 ⊃ S0;S), (n = 0 ⊃ S0;S) ⊆ (m = 0 ⊃ S0;S), f(S)(x) |
n = 0, f(S0)(x), S0 ⊆ S ⊦ S0 ⊆ (m = 0 ⊃ S0;S), (m = 0 ⊃ S0;S) ⊆ (n = 0 ⊃ S0;S), f(S)(x)
n ≠ 0, f(S0)(x), S0 ⊆ S ⊦ S ⊆ (m = 0 ⊃ S0;S), (m = 0 ⊃ S0;S) ⊆ (n = 0 ⊃ S0;S), f(S)(x)