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Theorem in-rec
⊦ a ∈ branch(t0, b, t1) ↔ a ∈ t0 ∨ a = b ∨ a ∈ t1
Type: An axiom
Validity: The proof is valid.
Features: ws, lws,
Comment:
Used by:
elem-le-tree-in-tree
,
elem-le-tree-unfold
,
in-tree-in-toList
,
tree-le-elem-in-tree
,
tree-le-elem-unfold
,
Used by units in proved state:
Proof exists?: No