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Theorem perm-dups-03

⊦ ¬ dups(x) ∧ dups(z) → ¬ perm(x, y + z)

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: perm-dups-01, app, ref, trans, sym-01,
Used spec theorems:
- Used simplifier rules:
  - list-dup/app-01-02
  - list/a