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Theorem disjoint-symmetric

⊦ disjoint(str, r ' + r0 ', st) ↔ disjoint(str, r0 ' + r ', st)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 7
Proof steps: 13
Used lemmas: disjoint-def,
Used spec theorems:
- Used simplifier rules:
  - list/references/in-append
  - list/references/a
  - list/references/in-17
  - list/references/in-06