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Syntax Definition wdisj 3995
Description: Extend wff notation to include the statement that a family of classes  B (
x ), for  x  e.  A, is a disjoint family.
Hypotheses
Ref Expression
vx  set  x
cA  class  A
cB  class  B
Assertion
Ref Expression
wdisj  wff Disj  x  e.  A B

See definition df-disj 3996 for more information.

Colors of variables: wff set class
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