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Theorem ismin

⊦ t ≠ leaf ∧ bst(t) ∧ b ≠ t .leftmost ∧ b ∈ t → t .leftmost < b

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: challenge3,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 5
Proof steps: 18
Used lemmas: leftmost-in, in-leaf, bst-leaf, bst-branch-strong, in-branch, leftmost, leftmost-left,
Used spec theorems:
- Used simplifier rules: