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Theorem get-rec

⊦ x ≠ [] ∧ n ≠ 0 → x[n] = x.rest[n - 1]

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: at-last, get-append-less, get-butlast, get-firstn, get-in, get-mklist, put-at, put-sw-in,
Used by units in proved state: olist, list-perm,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: get-rec-01,
Used spec theorems:
- Used simplifier rules: