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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 12546 2exp11 13239 2exp16 13240 139prm 13261 163prm 13262 317prm 13263 631prm 13264 1259lem2 13266 1259lem3 13267 1259lem4 13268 1259lem5 13269 log2tlbndlog2 16181 log2ublem3 16184 log2ublog2 16185 bposlem8 16279 lgsdir2lem1 16313 lgsdir2lem5 16317 2lgslem3a 16378 2lgslem3b 16379 2lgslem3c 16380 2lgslem3d 16381 2lgslem3a1 16382 2lgslem3b1 16383 2lgslem3c1 16384 2lgslem3d1 16385 2lgsoddprmlem1 16390 2lgsoddprmlem2 16391 2lgsoddprmlem3a 16392 2lgsoddprmlem3b 16393 2lgsoddprmlem3c 16394 2lgsoddprmlem3d 16395 ex-exp 16907 |
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