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Syntax Definition cprd 25298
Description: Extend class notation to include finite products/sums.
Ref Expression
cA  class  A
cB  class  B
vk  set  k
cG  class  G
Ref Expression
cprd  class  prod_ k  e.  A G B

See definition df-prod 25299 for more information.

Colors of variables: wff set class
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