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Theorem sym-01

⊦ perm(x, y) → perm(y, x)

Type: A user defined theorem
Validity: The proof is valid.
Features: localforward,
Comment:
Used by: a, adjoin, app-04, del-04, del-05, empty, empty-01, in-04, neq, papp-02, papp-03, perm-com1, perm-com2, perm-del, perm-del-01, perm-del-in, perm-dups-01, perm-dups-02, perm-dups-03, perm-mklist, perm-put, perm-rec, perm-rev, perm-rev-01, perm-same-prefix, perm-shift-in2, perm-shift-out2, shift-03, subperm, subperm-01,
Used by units in proved state: olist-sort, olist,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 1
Used lemmas: sym,
Used spec theorems:
- Used simplifier rules: