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Theorem prefixn-shorter

⊦ prefixn(n + 1, x0) = prefixn(n + 1, x1) → (prefixn(n, x0) = prefixn(n, x1) ↔ true)

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

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Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 13
Used lemmas: prefixn-add,
Used spec theorems:
- Used simplifier rules: