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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 7642 | . 2 class ℂ | |
2 | cnr 7129 | . . 3 class R | |
3 | 2, 2 | cxp 4545 | . 2 class (R × R) |
4 | 1, 3 | wceq 1332 | 1 wff ℂ = (R × R) |
Colors of variables: wff set class |
This definition is referenced by: opelcn 7658 0ncn 7663 cnm 7664 addcnsr 7666 mulcnsr 7667 dfcnqs 7673 addvalex 7676 axcnex 7691 axresscn 7692 axaddcl 7696 axmulcl 7698 axaddcom 7702 ax0id 7710 axcnre 7713 |
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