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| Mirrors > Home > MPE Home > Th. List > Mathboxes > df-bj-ccinfty | Structured version Visualization version GIF version | ||
| Description: Definition of the circle at infinity ℂ∞. (Contributed by BJ, 22-Jun-2019.) The precise definition is irrelevant and should generally not be used. (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| df-bj-ccinfty | ⊢ ℂ∞ = ran +∞ei |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cccinfty 34906 | . 2 class ℂ∞ | |
| 2 | cinftyexpi 34901 | . . 3 class +∞ei | |
| 3 | 2 | crn 5525 | . 2 class ran +∞ei |
| 4 | 1, 3 | wceq 1538 | 1 wff ℂ∞ = ran +∞ei |
| Colors of variables: wff setvar class |
| This definition is referenced by: bj-ccinftydisj 34908 bj-elccinfty 34909 bj-minftyccb 34920 |
| Copyright terms: Public domain | W3C validator |