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Syntax Definition crab 2670
Description: Extend class notation to include the restricted class abstraction (class builder).
Ref Expression
wph  wff  ph
vx  set  x
cA  class  A
Ref Expression
crab  class  { x  e.  A  |  ph }

See definition df-rab 2675 for more information.

Colors of variables: wff set class
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