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Mirrors > Home > ILE Home > Th. List > 7cn | GIF version |
Description: The number 7 is complex. (Contributed by David A. Wheeler, 8-Dec-2018.) |
Ref | Expression |
---|---|
7cn | ⊢ 7 ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 7re 8803 | . 2 ⊢ 7 ∈ ℝ | |
2 | 1 | recni 7778 | 1 ⊢ 7 ∈ ℂ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1480 ℂcc 7618 7c7 8776 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-resscn 7712 ax-1re 7714 ax-addrcl 7717 |
This theorem depends on definitions: df-bi 116 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-in 3077 df-ss 3084 df-2 8779 df-3 8780 df-4 8781 df-5 8782 df-6 8783 df-7 8784 |
This theorem is referenced by: 8m1e7 8845 7p2e9 8871 7p3e10 9256 7t2e14 9290 7t4e28 9292 7t7e49 9295 cos2bnd 11467 |
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