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Theorem lastn-lastn

⊦ lastn(n, lastn(n, x)) = lastn(n, x)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 5
Used lemmas: lastN-rec-01, lastN-rec, lastN-zero,
Used spec theorems:
- Used simplifier rules:
  - nat-basic2/succ
  - list/app-03
  - nat-basic2/c
  - nat-basic2/a
  - list/a
  - list/Last