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Proof step 14 from proof set-butmin (previous step)

bst(t), t.leftmost ∈ t ⊦ t.set.butmin = t.butleftmost.set, t = leaf

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ s1 = s2 ↔ (∀ a. a ∈ s1 ↔ a ∈ s2)

Rule argument

spec: set-basic inst: name: Extension seq: ⊦ s1 = s2 ↔ (∀ a. a ∈ s1 ↔ a ∈ s2) subst: [s2, s1] → [t.butleftmost.set, t.set.butmin] flags: rewrite

Additional information

[Concretesimprules(()), Extraterms((t.butleftmost.sett.set.butmin))]