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Definition df-mi 8498
Description: Define multiplication on positive integers. This is a "temporary" set used in the construction of complex numbers df-c 8743, and is intended to be used only by the construction. (Contributed by NM, 26-Aug-1995.) (New usage is discouraged.)
Assertion
Ref Expression
df-mi  |-  .N  =  (  .o  |`  ( N.  X.  N. ) )

Detailed syntax breakdown of Definition df-mi
StepHypRef Expression
1 cmi 8468 . 2  class  .N
2 comu 6477 . . 3  class  .o
3 cnpi 8466 . . . 4  class  N.
43, 3cxp 4687 . . 3  class  ( N. 
X.  N. )
52, 4cres 4691 . 2  class  (  .o  |`  ( N.  X.  N. ) )
61, 5wceq 1623 1  wff  .N  =  (  .o  |`  ( N.  X.  N. ) )
Colors of variables: wff set class
This definition is referenced by:  mulpiord  8509  dmmulpi  8515
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