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Theorem sym-02
⊦ ¬ perm(x, y) → ¬ perm(y, x)
Type: A user defined theorem
Validity: The proof is valid.
Features: localsimp, localforward,
Comment:
Used by:
a
,
adjoin
,
del-01
,
del-04
,
diff
,
filter
,
neq
,
papp-02
,
papp-03
,
perm-com1
,
perm-com2
,
perm-del
,
perm-del-01
,
perm-put
,
perm-put-del1
,
perm-rec
,
perm-rev
,
perm-rev-01
,
perm-shift-in2
,
perm-shift-out2
,
ref
,
trans
,
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: