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Theorem shift-03

⊦ perm(x + a ' + x0, y) ↔ perm(a ' + x + x0, y)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: perm-rec, rec-01,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 8
Proof steps: 14
Used lemmas: in, del-02, ref, app, perm-rmv-in-list, trans, sym-01, perm-l, del-01,
Used spec theorems:
- list-del/sw-02
Used simplifier rules: