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Theorem firstn-one

⊦ firstn(1, a ' + x) = a '

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: 0
Proof steps: 1
Used lemmas: firstN-zero, firstN-num-rec,
Used spec theorems:
- Used simplifier rules:
  - list/c-04
  - list/a
  - list/app