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Definition df-i 8963
Description: Define the complex number  _i (the imaginary unit). (Contributed by NM, 22-Feb-1996.) (New usage is discouraged.)
Assertion
Ref Expression
df-i  |-  _i  =  <. 0R ,  1R >.

Detailed syntax breakdown of Definition df-i
StepHypRef Expression
1 ci 8956 . 2  class  _i
2 c0r 8707 . . 3  class  0R
3 c1r 8708 . . 3  class  1R
42, 3cop 3785 . 2  class  <. 0R ,  1R >.
51, 4wceq 1649 1  wff  _i  =  <. 0R ,  1R >.
Colors of variables: wff set class
This definition is referenced by:  axicn  8989  axi2m1  8998  axcnre  9003  avril1  21718
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