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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 9391 | . 2 ⊢ 8 ∈ ℝ | |
| 2 | 1 | recni 8338 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 ℂcc 8177 8c8 9363 |
| 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 df-8 9371 |
| This theorem is used by: 9m1e8 9432 8p2e10 9865 8t2e16 9900 8t5e40 9903 cos2bnd 12543 2exp11 13236 2exp16 13237 139prm 13258 163prm 13259 317prm 13260 631prm 13261 1259lem2 13263 1259lem3 13264 1259lem4 13265 1259lem5 13266 log2tlbndlog2 16139 log2ublem3 16142 log2ublog2 16143 lgsdir2lem1 16245 lgsdir2lem5 16249 2lgslem3a 16310 2lgslem3b 16311 2lgslem3c 16312 2lgslem3d 16313 2lgslem3a1 16314 2lgslem3b1 16315 2lgslem3c1 16316 2lgslem3d1 16317 2lgsoddprmlem1 16322 2lgsoddprmlem2 16323 2lgsoddprmlem3a 16324 2lgsoddprmlem3b 16325 2lgsoddprmlem3c 16326 2lgsoddprmlem3d 16327 ex-exp 16839 |
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