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Theorem perm-switch

⊦ m < # y ∧ n < # y ∧ a = y[n] ∧ b = y[m] → (perm(x, y[m, a][n, b]) ↔ perm(x, y))

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 5
Proof steps: 8
Used lemmas: ocs-sw, perm-all,
Used spec theorems:
- Used simplifier rules: