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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 6887 | . 2 class ℂ | |
2 | cnr 6395 | . . 3 class R | |
3 | 2, 2 | cxp 4343 | . 2 class (R × R) |
4 | 1, 3 | wceq 1243 | 1 wff ℂ = (R × R) |
Colors of variables: wff set class |
This definition is referenced by: opelcn 6903 0ncn 6908 addcnsr 6910 mulcnsr 6911 dfcnqs 6917 addvalex 6920 axcnex 6935 axresscn 6936 axaddcl 6940 axmulcl 6942 axaddcom 6944 ax0id 6952 axcnre 6955 |
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