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Theorem in-10
⊦ ¬ a ∈ x → (a ∈ b ' + x ↔ a = b)
Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
firstoc
,
in-01
,
inapp-06
,
Used by units in proved state:
list-perm
,
list-dup
,
Proof exists?: Yes
View
the proof
Infos about the proof
Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas:
a
,
in-rec
,
Used spec theorems:
Used simplifier rules: