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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 9218 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 8196 | 1 ⊢ 2 ∈ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2201 ℂcc 8035 2c2 9199 |
| 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 2212 ax-resscn 8129 ax-1re 8131 ax-addrcl 8134 |
| This theorem depends on definitions: df-bi 117 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-in 3205 df-ss 3212 df-2 9207 |
| This theorem is referenced by: 2ex 9220 2cnd 9221 2m1e1 9266 3m1e2 9268 2p2e4 9275 times2 9277 2div2e1 9281 1p2e3 9283 3p3e6 9291 4p3e7 9293 5p3e8 9296 6p3e9 9299 2t1e2 9302 2t2e4 9303 3t3e9 9306 2t0e0 9308 4d2e2 9309 2cnne0 9358 1mhlfehlf 9367 8th4div3 9368 halfpm6th 9369 2mulicn 9371 2muliap0 9373 halfcl 9375 half0 9377 2halves 9378 halfaddsub 9383 div4p1lem1div2 9403 3halfnz 9582 zneo 9586 nneoor 9587 zeo 9590 7p3e10 9690 4t4e16 9714 6t3e18 9720 7t7e49 9729 8t5e40 9733 9t9e81 9744 decbin0 9755 decbin2 9756 halfthird 9758 fztpval 10323 fz0tp 10362 fz0to4untppr 10364 fzo0to3tp 10470 2tnp1ge0ge0 10567 fldiv4lem1div2 10573 expubnd 10864 sq2 10903 sq4e2t8 10905 cu2 10906 subsq2 10915 binom2sub 10921 binom3 10925 zesq 10926 fac2 10999 fac3 11000 faclbnd2 11010 bcn2 11032 4bc2eq6 11042 crre 11440 addcj 11474 imval2 11477 resqrexlemover 11593 resqrexlemcalc1 11597 resqrexlemnm 11601 resqrexlemcvg 11602 amgm2 11701 arisum 12082 arisum2 12083 geo2sum2 12099 geo2lim 12100 geoihalfsum 12106 efcllemp 12242 ege2le3 12255 tanval2ap 12297 tanval3ap 12298 efi4p 12301 efival 12316 sinadd 12320 cosadd 12321 sinmul 12328 cosmul 12329 cos2tsin 12335 ef01bndlem 12340 sin01bnd 12341 cos01bnd 12342 cos1bnd 12343 cos2bnd 12344 cos01gt0 12347 sin02gt0 12348 sin4lt0 12351 cos12dec 12352 egt2lt3 12364 odd2np1lem 12456 odd2np1 12457 ltoddhalfle 12477 halfleoddlt 12478 opoe 12479 omoe 12480 opeo 12481 omeo 12482 nno 12490 nn0o 12491 flodddiv4 12520 bits0 12532 bitsfzolem 12538 0bits 12543 bitsinv1 12546 6gcd4e2 12589 3lcm2e6woprm 12681 6lcm4e12 12682 sqrt2irrlem 12756 oddpwdclemodd 12767 pythagtriplem1 12861 pythagtriplem12 12871 pythagtriplem14 12873 4sqlem11 12997 4sqlem12 12998 dec5dvds 13008 dec2nprm 13011 2exp5 13028 2exp6 13029 2exp7 13030 2exp8 13031 2exp11 13032 2exp16 13033 maxcncf 15368 mincncf 15369 coscn 15523 sinhalfpilem 15544 cospi 15553 ef2pi 15558 ef2kpi 15559 efper 15560 sinperlem 15561 sin2kpi 15564 cos2kpi 15565 sin2pim 15566 cos2pim 15567 ptolemy 15577 sincosq3sgn 15581 sincosq4sgn 15582 sinq12gt0 15583 cosq23lt0 15586 coseq00topi 15588 tangtx 15591 sincos4thpi 15593 sincos6thpi 15595 sincos3rdpi 15596 pigt3 15597 abssinper 15599 coskpi 15601 cosq34lt1 15603 logsqrt 15676 2logb9irrALT 15727 1sgm2ppw 15748 perfect1 15751 perfectlem1 15752 perfectlem2 15753 perfect 15754 lgsdir2lem2 15787 gausslemma2dlem6 15825 lgsquadlem1 15835 lgsquadlem2 15836 lgsquad2lem2 15840 m1lgs 15843 2lgslem3a 15851 2lgslem3b 15852 2lgslem3c 15853 2lgslem3d 15854 2lgsoddprmlem2 15864 2lgsoddprmlem3c 15867 2lgsoddprmlem3d 15868 clwwlknonex2 16319 ex-fl 16378 ex-ceil 16379 ex-exp 16380 ex-fac 16381 |
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