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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 9389 | . 2 ⊢ 7 ∈ ℝ | |
| 2 | 1 | recni 8338 | 1 ⊢ 7 ∈ ℂ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 ℂcc 8177 7c7 9362 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-resscn 8271 ax-1re 8273 ax-addrcl 8276 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 df-2 9365 df-3 9366 df-4 9367 df-5 9368 df-6 9369 df-7 9370 |
| This theorem is used by: 8m1e7 9431 7p2e9 9458 7p3e10 9860 7t2e14 9894 7t4e28 9896 7t7e49 9899 cos2bnd 12543 23prm 13253 83prm 13257 139prm 13258 163prm 13259 317prm 13260 631prm 13261 1259lem1 13262 1259lem2 13263 1259lem3 13264 1259lem4 13265 1259lem5 13266 1259prm 13267 log2ublem3 16142 log2ublog2 16143 bclbnd 16205 2lgslem3d 16313 |
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