| (m < bag0.max ⊃ bag0.max;m) = (m = (m < bag0.max ⊃ bag0.max;m) ⊃ bag0;(bag0 -- bag0.max) ++ m).max, count((m < bag0.max ⊃ bag0.max;m), bag0 ++ m) = 1, bag0.max = (bag0 -- bag0.max).max ∧ count(bag0.max, bag0) = 1 → bag0 = ∅ ++ bag0.max ⊦ (m = (m < bag0.max ⊃ bag0.max;m) ⊃ bag0;(bag0 -- bag0.max) ++ m) = ∅, bag0 = ∅, m < bag0.max |
count(bag0.max, bag0) = 0 ⊦ bag0 = ∅
Used simplifier rules: ⊦ count(n, bag0) = 0 → bag0 -- n = bag0; (s)% ⊦ m ≤ m; (s)% ⊦ m < n ↔ ¬ n ≤ m; (ss)%c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic% ⊦ 1 = m + 1 ↔ m = 0; (s)% ⊦ count(n, bag0 ++ n) = count(n, bag0) + 1; (s)