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Theorem perm-same-prefix

⊦ perm(y, z) ↔ (∃ x, y0, z0. y = x + y0 ∧ z = x + z0 ∧ perm(y0, z0))

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment: useful for induction on # y0.
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: ref, trans, sym-01, a,
Used spec theorems:
- Used simplifier rules:
  - list/Nil
  - list/a