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Theorem elem-le-tree-unfold

⊦ a ≤ t ↔ (∀ b. b ∈ t → ¬ b < a)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: toList-ordered-tree-ordered,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 7
Proof steps: 20
Used lemmas: in-rec, elem-le-tree-rec, elem-le-tree-base, elem-le-tree-in-tree,
Used spec theorems:
- Used simplifier rules: