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Theorem firstN-dups-01

⊦ n < # y ∧ ¬ dups(x + y) → ¬ dups(x + firstn(n, y))

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: 1
Proof steps: 2
Used lemmas: firstN-dups-03,
Used spec theorems:
- Used simplifier rules:
  - list-data/l
  - list/a
  - list-dup/a
  - nat-basic1/f
  - nat/lels-03