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Definition df-mi 6376
Description: Define multiplication on positive integers. This is a "temporary" set used in the construction of complex numbers and is intended to be used only by the construction. (Contributed by NM, 26-Aug-1995.)
Assertion
Ref Expression
df-mi  |-  .N  =  (  .o  |`  ( N.  X.  N. ) )

Detailed syntax breakdown of Definition df-mi
StepHypRef Expression
1 cmi 6344 . 2  class  .N
2 comu 5977 . . 3  class  .o
3 cnpi 6342 . . . 4  class  N.
43, 3cxp 4321 . . 3  class  ( N. 
X.  N. )
52, 4cres 4325 . 2  class  (  .o  |`  ( N.  X.  N. ) )
61, 5wceq 1243 1  wff  .N  =  (  .o  |`  ( N.  X.  N. ) )
Colors of variables: wff set class
This definition is referenced by:  mulpiord  6387  dmmulpi  6396
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