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