Definition df-i 7905

Description: Define the complex number _i (the imaginary unit). (Contributed by NM, 22-Feb-1996.)

Assertion

Ref	Expression
df-i	|- _i = <. 0R , 1R >.

Detailed syntax breakdown of Definition df-i

Step	Hyp	Ref	Expression
1		ci 7898	. 2 class _i
2		c0r 7382	. . 3 class 0R
3		c1r 7383	. . 3 class 1R
4	2, 3	cop 3626	. 2 class <. 0R , 1R >.
5	1, 4	wceq 1364	1 wff _i = <. 0R , 1R >.

This definition is referenced by:  axicn  7947  axi2m1  7959  axcnre  7965