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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 9312 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 8291 | 1 ⊢ 2 ∈ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2205 ℂcc 8130 2c2 9293 |
| 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 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-11 1555 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2216 ax-resscn 8224 ax-1re 8226 ax-addrcl 8229 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-in 3219 df-ss 3226 df-2 9301 |
| This theorem is referenced by: 2ex 9314 2cnd 9315 2m1e1 9360 3m1e2 9362 2p2e4 9369 times2 9371 2div2e1 9375 1p2e3 9377 3p3e6 9385 4p3e7 9387 5p3e8 9390 6p3e9 9393 2t1e2 9396 2t2e4 9397 3t3e9 9400 2t0e0 9402 4d2e2 9403 2cnne0 9452 1mhlfehlf 9461 8th4div3 9462 halfpm6th 9463 2mulicn 9465 2muliap0 9467 halfcl 9469 half0 9471 2halves 9472 halfaddsub 9477 div4p1lem1div2 9497 3halfnz 9681 zneo 9685 nneoor 9686 zeo 9689 7p3e10 9789 4t4e16 9813 6t3e18 9819 7t7e49 9828 8t5e40 9832 9t9e81 9843 decbin0 9854 decbin2 9855 halfthird 9857 fztpval 10424 fz0tp 10463 fz0to4untppr 10465 fzo0to3tp 10571 2tnp1ge0ge0 10668 fldiv4lem1div2 10674 expubnd 10965 sq2 11004 sq4e2t8 11006 cu2 11007 subsq2 11016 binom2sub 11022 binom3 11026 zesq 11028 fac2 11101 fac3 11102 faclbnd2 11112 bcn2 11134 4bc2eq6 11145 crre 11550 addcj 11584 imval2 11587 resqrexlemover 11703 resqrexlemcalc1 11707 resqrexlemnm 11711 resqrexlemcvg 11712 amgm2 11811 arisum 12192 arisum2 12193 geo2sum2 12209 geo2lim 12210 geoihalfsum 12216 efcllemp 12352 ege2le3 12365 tanval2ap 12407 tanval3ap 12408 efi4p 12411 efival 12426 sinadd 12430 cosadd 12431 sinmul 12438 cosmul 12439 cos2tsin 12445 ef01bndlem 12450 sin01bnd 12451 cos01bnd 12452 cos1bnd 12453 cos2bnd 12454 cos01gt0 12457 sin02gt0 12458 sin4lt0 12461 cos12dec 12462 egt2lt3 12474 odd2np1lem 12566 odd2np1 12567 ltoddhalfle 12587 halfleoddlt 12588 opoe 12589 omoe 12590 opeo 12591 omeo 12592 nno 12600 nn0o 12601 flodddiv4 12630 bits0 12642 bitsfzolem 12648 0bits 12653 bitsinv1 12656 6gcd4e2 12699 3lcm2e6woprm 12791 6lcm4e12 12792 sqrt2irrlem 12866 oddpwdclemodd 12877 pythagtriplem1 12971 pythagtriplem12 12981 pythagtriplem14 12983 4sqlem11 13107 4sqlem12 13108 dec5dvds 13118 dec2nprm 13121 2exp5 13138 2exp6 13139 2exp7 13140 2exp8 13141 2exp11 13142 2exp16 13143 ballotfilem2 13153 maxcncf 15529 mincncf 15530 coscn 15684 sinhalfpilem 15705 cospi 15714 ef2pi 15719 ef2kpi 15720 efper 15721 sinperlem 15722 sin2kpi 15725 cos2kpi 15726 sin2pim 15727 cos2pim 15728 ptolemy 15738 sincosq3sgn 15742 sincosq4sgn 15743 sinq12gt0 15744 cosq23lt0 15747 coseq00topi 15749 tangtx 15752 sincos4thpi 15754 sincos6thpi 15756 sincos3rdpi 15757 pigt3 15758 abssinper 15760 coskpi 15762 cosq34lt1 15764 logsqrt 15837 2logb9irrALT 15888 1sgm2ppw 15912 perfect1 15915 perfectlem1 15916 perfectlem2 15917 perfect 15918 lgsdir2lem2 15951 gausslemma2dlem6 15989 lgsquadlem1 15999 lgsquadlem2 16000 lgsquad2lem2 16004 m1lgs 16007 2lgslem3a 16015 2lgslem3b 16016 2lgslem3c 16017 2lgslem3d 16018 2lgsoddprmlem2 16028 2lgsoddprmlem3c 16031 2lgsoddprmlem3d 16032 clwwlknonex2 16483 ex-fl 16542 ex-ceil 16543 ex-exp 16544 ex-fac 16545 |
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