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Theorem prefix-prefixn-not-shorter

⊦ prefixn(n, x0) ⊑ x1 ∧ n < # x0 → ¬ # x1 < n

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 3
Used lemmas: prefixn,
Used spec theorems:
- list-last/prefix
Used simplifier rules: