Definition df-i 9945

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

Step	Hyp	Ref	Expression
1		ci 9938	. 2 class _i
2		c0r 9688	. . 3 class 0R
3		c1r 9689	. . 3 class 1R
4	2, 3	cop 4183	. 2 class <. 0R , 1R >.
5	1, 4	wceq 1483	1 wff _i = <. 0R , 1R >.

This definition is referenced by:  axicn  9971  axi2m1  9980  axcnre  9985  avril1  27319