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| Mirrors > Home > ILE Home > Th. List > 2cn | GIF version | ||
| Description: The number 2 is a complex number. (Contributed by NM, 30-Jul-2004.) |
| Ref | Expression |
|---|---|
| 2cn | ⊢ 2 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2re 9213 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 8191 | 1 ⊢ 2 ∈ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 ℂcc 8030 2c2 9194 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-11 1554 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-resscn 8124 ax-1re 8126 ax-addrcl 8129 |
| This theorem depends on definitions: df-bi 117 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-in 3206 df-ss 3213 df-2 9202 |
| This theorem is referenced by: 2ex 9215 2cnd 9216 2m1e1 9261 3m1e2 9263 2p2e4 9270 times2 9272 2div2e1 9276 1p2e3 9278 3p3e6 9286 4p3e7 9288 5p3e8 9291 6p3e9 9294 2t1e2 9297 2t2e4 9298 3t3e9 9301 2t0e0 9303 4d2e2 9304 2cnne0 9353 1mhlfehlf 9362 8th4div3 9363 halfpm6th 9364 2mulicn 9366 2muliap0 9368 halfcl 9370 half0 9372 2halves 9373 halfaddsub 9378 div4p1lem1div2 9398 3halfnz 9577 zneo 9581 nneoor 9582 zeo 9585 7p3e10 9685 4t4e16 9709 6t3e18 9715 7t7e49 9724 8t5e40 9728 9t9e81 9739 decbin0 9750 decbin2 9751 halfthird 9753 fztpval 10318 fz0tp 10357 fz0to4untppr 10359 fzo0to3tp 10465 2tnp1ge0ge0 10562 fldiv4lem1div2 10568 expubnd 10859 sq2 10898 sq4e2t8 10900 cu2 10901 subsq2 10910 binom2sub 10916 binom3 10920 zesq 10921 fac2 10994 fac3 10995 faclbnd2 11005 bcn2 11027 4bc2eq6 11037 crre 11419 addcj 11453 imval2 11456 resqrexlemover 11572 resqrexlemcalc1 11576 resqrexlemnm 11580 resqrexlemcvg 11581 amgm2 11680 arisum 12061 arisum2 12062 geo2sum2 12078 geo2lim 12079 geoihalfsum 12085 efcllemp 12221 ege2le3 12234 tanval2ap 12276 tanval3ap 12277 efi4p 12280 efival 12295 sinadd 12299 cosadd 12300 sinmul 12307 cosmul 12308 cos2tsin 12314 ef01bndlem 12319 sin01bnd 12320 cos01bnd 12321 cos1bnd 12322 cos2bnd 12323 cos01gt0 12326 sin02gt0 12327 sin4lt0 12330 cos12dec 12331 egt2lt3 12343 odd2np1lem 12435 odd2np1 12436 ltoddhalfle 12456 halfleoddlt 12457 opoe 12458 omoe 12459 opeo 12460 omeo 12461 nno 12469 nn0o 12470 flodddiv4 12499 bits0 12511 bitsfzolem 12517 0bits 12522 bitsinv1 12525 6gcd4e2 12568 3lcm2e6woprm 12660 6lcm4e12 12661 sqrt2irrlem 12735 oddpwdclemodd 12746 pythagtriplem1 12840 pythagtriplem12 12850 pythagtriplem14 12852 4sqlem11 12976 4sqlem12 12977 dec5dvds 12987 dec2nprm 12990 2exp5 13007 2exp6 13008 2exp7 13009 2exp8 13010 2exp11 13011 2exp16 13012 maxcncf 15342 mincncf 15343 coscn 15497 sinhalfpilem 15518 cospi 15527 ef2pi 15532 ef2kpi 15533 efper 15534 sinperlem 15535 sin2kpi 15538 cos2kpi 15539 sin2pim 15540 cos2pim 15541 ptolemy 15551 sincosq3sgn 15555 sincosq4sgn 15556 sinq12gt0 15557 cosq23lt0 15560 coseq00topi 15562 tangtx 15565 sincos4thpi 15567 sincos6thpi 15569 sincos3rdpi 15570 pigt3 15571 abssinper 15573 coskpi 15575 cosq34lt1 15577 logsqrt 15650 2logb9irrALT 15701 1sgm2ppw 15722 perfect1 15725 perfectlem1 15726 perfectlem2 15727 perfect 15728 lgsdir2lem2 15761 gausslemma2dlem6 15799 lgsquadlem1 15809 lgsquadlem2 15810 lgsquad2lem2 15814 m1lgs 15817 2lgslem3a 15825 2lgslem3b 15826 2lgslem3c 15827 2lgslem3d 15828 2lgsoddprmlem2 15838 2lgsoddprmlem3c 15841 2lgsoddprmlem3d 15842 clwwlknonex2 16293 ex-fl 16338 ex-ceil 16339 ex-exp 16340 ex-fac 16341 |
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