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Proof step 20 from proof split-put (previous step)
| str ∈ sdt ⊦ dnode(md, sdt)[str ' + q, tree0] = dnode(md, sdt[str, sdt[str][q, tree0]]) |
User applied rule insert rewrite lemma
And obtained the following new goals
- Proof step 21:
p ≠ ε ⊦ str ∈ sdt → dnode(md, sdt)[str ' + p, tree0] = dnode(md, sdt[str, sdt[str][p, tree0]])
- Proof step 22:
⊦ dnode(md, sdt)[str ', tree0] = dnode(md, sdt[str, tree0])
- Proof step 23:
⊦ tree[ε, tree0] = tree0
Rule argument
spec: <toplevel>
name: put-rec
seq: p ≠ ε
⊦ str ∈ sdt
→ dnode(md, sdt)[str ' + p, tree0]
= dnode(md, sdt[str, sdt[str][p, tree0]])
subst: [tree0, p, str, sdt, md] → [tree0, q, str, sdt, md]
flags: <all paths>Additional information
Used simplifier rules:
put-here: ⊦ dnode(md, sdt)[str ', tree0] = dnode(md, sdt[str, tree0]);%nil-put: ⊦ tree[ε, tree0] = tree0;% ⊦ p + ε = p; (s)%a: ⊦ (p + p0) + p1 = p + p0 + p1; from specification list[path]
Used terms: tree0, q, str, sdt, md