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| Mirrors > Home > ILE Home > Th. List > 8cn | GIF version | ||
| Description: The number 8 is complex. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| 8cn | ⊢ 8 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 8re 9392 | . 2 ⊢ 8 ∈ ℝ | |
| 2 | 1 | recni 8339 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 ℂcc 8178 8c8 9364 |
| 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 8272 ax-1re 8274 ax-addrcl 8277 |
| 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 9366 df-3 9367 df-4 9368 df-5 9369 df-6 9370 df-7 9371 df-8 9372 |
| This theorem is used by: 9m1e8 9433 8p2e10 9866 8t2e16 9901 8t5e40 9904 cos2bnd 12545 2exp11 13238 2exp16 13239 139prm 13260 163prm 13261 317prm 13262 631prm 13263 1259lem2 13265 1259lem3 13266 1259lem4 13267 1259lem5 13268 log2tlbndlog2 16142 log2ublem3 16145 log2ublog2 16146 lgsdir2lem1 16269 lgsdir2lem5 16273 2lgslem3a 16334 2lgslem3b 16335 2lgslem3c 16336 2lgslem3d 16337 2lgslem3a1 16338 2lgslem3b1 16339 2lgslem3c1 16340 2lgslem3d1 16341 2lgsoddprmlem1 16346 2lgsoddprmlem2 16347 2lgsoddprmlem3a 16348 2lgsoddprmlem3b 16349 2lgsoddprmlem3c 16350 2lgsoddprmlem3d 16351 ex-exp 16863 |
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