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| Mirrors > Home > ILE Home > Th. List > 4cn | Unicode version | ||
| Description: The number 4 is a complex number. (Contributed by David A. Wheeler, 7-Jul-2016.) |
| Ref | Expression |
|---|---|
| 4cn |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4re 9383 |
. 2
| |
| 2 | 1 | recni 8338 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| 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 |
| This theorem is used by: 5m1e4 9428 4p2e6 9450 4p3e7 9451 4p4e8 9452 4t2e8 9466 2t4e8 9467 4d2e2 9469 8th4div3 9528 div4p1lem1div2 9563 5p5e10 9856 4t4e16 9884 6t5e30 9892 fzo0to42pr 10648 fldiv4p1lem1div2 10753 sq4e2t8 11087 sqoddm1div8 11144 4bc3eq4 11226 4bc2eq6 11227 resqrexlemover 11790 resqrexlemcalc1 11794 resqrexlemcalc3 11796 cos2bnd 12543 flodddiv4 12719 6gcd4e2 12788 6lcm4e12 12881 pythagtriplem1 13064 2exp11 13236 13prm 13250 43prm 13256 83prm 13257 163prm 13259 317prm 13260 631prm 13261 1259lem1 13262 1259lem2 13263 1259lem3 13264 1259lem4 13265 1259lem5 13266 1259prm 13267 dveflem 15876 sincosq4sgn 15980 cosq23lt0 15984 sincos6thpi 15993 log2tlbndlog2 16139 log2ublem3 16142 log2ublog2 16143 bclbnd 16205 2lgslem3a 16310 2lgslem3b 16311 2lgslem3c 16312 2lgslem3d 16313 2lgsoddprmlem2 16323 2lgsoddprmlem3c 16326 2lgsoddprmlem3d 16327 ex-exp 16839 ex-fac 16840 ex-bc 16841 |
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