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Proof step 3 from proof min-del (previous step)

s.min ∈ s, s.max ∈ s ⊦ # s = 0, (s -- a).min = s.min, a = s.min, s = ∅, s.max < s.min

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
a ∈ s, ∀ b. b ∈ s → ¬ b < a ⊦ a = s.min

Rule argument

spec: <toplevel> name: min-q seq: a ∈ s, ∀ b. b ∈ s → ¬ b < a ⊦ a = s.min subst: [a, s] → [s.min, s -- a] flags: <rotated> <all paths>

Additional information

Used simplifier rules: Max-max: ⊦ a ∈ s → ¬ s.max < a;%Min-min: ⊦ a ∈ s → ¬ a < s.min;% ⊦ a ∈ s -- b ↔ a ≠ b ∧ a ∈ s; (ws) Used terms: s.min, s -- a