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Theorem Delete
⊦ a ∈ s -- b ↔ a ≠ b ∧ a ∈ s
Type: An axiom
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
del-addeq-01
,
del-addeq-05
,
del-addeq-06
,
del-d-01
,
del-in
,
del-in-01
,
del-in-02
,
del-notin
,
del-rax
,
delete-insert
,
delsw
,
delsw-02
,
diff-del
,
diff-del-01
,
diff-del-02
,
int-del-rew
,
sub-del
,
sub-del-05
,
undel-01
,
undel-04
,
Used by units in proved state:
Proof exists?: No