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Theorem tree-le-elem-toList-last

t ≠ leaf ⊦ t ≤ a → ¬ a < t.toList.last

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 6
Used lemmas: toList-base, tree-le-elem-base, toList-rec, tree-le-elem-rec,
Used spec theorems:
- Used simplifier rules: