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Mirrors > Home > MPE Home > Th. List > df-c | Structured version Visualization version GIF version |
Description: Define the set of complex numbers. The 23 axioms for complex numbers start at axresscn 11139. (Contributed by NM, 22-Feb-1996.) (New usage is discouraged.) |
Ref | Expression |
---|---|
df-c | ⊢ ℂ = (R × R) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cc 11104 | . 2 class ℂ | |
2 | cnr 10856 | . . 3 class R | |
3 | 2, 2 | cxp 5673 | . 2 class (R × R) |
4 | 1, 3 | wceq 1541 | 1 wff ℂ = (R × R) |
Colors of variables: wff setvar class |
This definition is referenced by: opelcn 11120 0ncn 11124 addcnsr 11126 mulcnsr 11127 dfcnqs 11133 axaddf 11136 axmulf 11137 axcnex 11138 axresscn 11139 axcnre 11155 wuncn 11161 bj-inftyexpitaudisj 36074 |
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