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Mirrors > Home > ILE Home > Th. List > df-c | GIF version |
Description: Define the set of complex numbers. (Contributed by NM, 22-Feb-1996.) |
Ref | Expression |
---|---|
df-c | ⊢ ℂ = (R × R) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cc 7809 | . 2 class ℂ | |
2 | cnr 7296 | . . 3 class R | |
3 | 2, 2 | cxp 4625 | . 2 class (R × R) |
4 | 1, 3 | wceq 1353 | 1 wff ℂ = (R × R) |
Colors of variables: wff set class |
This definition is referenced by: opelcn 7825 0ncn 7830 cnm 7831 addcnsr 7833 mulcnsr 7834 dfcnqs 7840 addvalex 7843 axcnex 7858 axresscn 7859 axaddcl 7863 axmulcl 7865 axaddcom 7869 ax0id 7877 axcnre 7880 |
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