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Definition df-bj-ccbar 33432
Description: Definition of the set of extended complex numbers ℂ̅. (Contributed by BJ, 22-Jun-2019.)
Assertion
Ref Expression
df-bj-ccbar ℂ̅ = (ℂ ∪ ℂ)

Detailed syntax breakdown of Definition df-bj-ccbar
StepHypRef Expression
1 cccbar 33431 . 2 class ℂ̅
2 cc 10146 . . 3 class
3 cccinfty 33427 . . 3 class
42, 3cun 3713 . 2 class (ℂ ∪ ℂ)
51, 4wceq 1632 1 wff ℂ̅ = (ℂ ∪ ℂ)
Colors of variables: wff setvar class
This definition is referenced by:  bj-ccssccbar  33433  bj-ccinftyssccbar  33434
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