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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 9303 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 8282 | 1 ⊢ 2 ∈ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2203 ℂcc 8121 2c2 9284 |
| 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 2214 ax-resscn 8215 ax-1re 8217 ax-addrcl 8220 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-in 3216 df-ss 3223 df-2 9292 |
| This theorem is referenced by: 2ex 9305 2cnd 9306 2m1e1 9351 3m1e2 9353 2p2e4 9360 times2 9362 2div2e1 9366 1p2e3 9368 3p3e6 9376 4p3e7 9378 5p3e8 9381 6p3e9 9384 2t1e2 9387 2t2e4 9388 3t3e9 9391 2t0e0 9393 4d2e2 9394 2cnne0 9443 1mhlfehlf 9452 8th4div3 9453 halfpm6th 9454 2mulicn 9456 2muliap0 9458 halfcl 9460 half0 9462 2halves 9463 halfaddsub 9468 div4p1lem1div2 9488 3halfnz 9671 zneo 9675 nneoor 9676 zeo 9679 7p3e10 9779 4t4e16 9803 6t3e18 9809 7t7e49 9818 8t5e40 9822 9t9e81 9833 decbin0 9844 decbin2 9845 halfthird 9847 fztpval 10413 fz0tp 10452 fz0to4untppr 10454 fzo0to3tp 10560 2tnp1ge0ge0 10657 fldiv4lem1div2 10663 expubnd 10954 sq2 10993 sq4e2t8 10995 cu2 10996 subsq2 11005 binom2sub 11011 binom3 11015 zesq 11016 fac2 11089 fac3 11090 faclbnd2 11100 bcn2 11122 4bc2eq6 11132 crre 11535 addcj 11569 imval2 11572 resqrexlemover 11688 resqrexlemcalc1 11692 resqrexlemnm 11696 resqrexlemcvg 11697 amgm2 11796 arisum 12177 arisum2 12178 geo2sum2 12194 geo2lim 12195 geoihalfsum 12201 efcllemp 12337 ege2le3 12350 tanval2ap 12392 tanval3ap 12393 efi4p 12396 efival 12411 sinadd 12415 cosadd 12416 sinmul 12423 cosmul 12424 cos2tsin 12430 ef01bndlem 12435 sin01bnd 12436 cos01bnd 12437 cos1bnd 12438 cos2bnd 12439 cos01gt0 12442 sin02gt0 12443 sin4lt0 12446 cos12dec 12447 egt2lt3 12459 odd2np1lem 12551 odd2np1 12552 ltoddhalfle 12572 halfleoddlt 12573 opoe 12574 omoe 12575 opeo 12576 omeo 12577 nno 12585 nn0o 12586 flodddiv4 12615 bits0 12627 bitsfzolem 12633 0bits 12638 bitsinv1 12641 6gcd4e2 12684 3lcm2e6woprm 12776 6lcm4e12 12777 sqrt2irrlem 12851 oddpwdclemodd 12862 pythagtriplem1 12956 pythagtriplem12 12966 pythagtriplem14 12968 4sqlem11 13092 4sqlem12 13093 dec5dvds 13103 dec2nprm 13106 2exp5 13123 2exp6 13124 2exp7 13125 2exp8 13126 2exp11 13127 2exp16 13128 maxcncf 15467 mincncf 15468 coscn 15622 sinhalfpilem 15643 cospi 15652 ef2pi 15657 ef2kpi 15658 efper 15659 sinperlem 15660 sin2kpi 15663 cos2kpi 15664 sin2pim 15665 cos2pim 15666 ptolemy 15676 sincosq3sgn 15680 sincosq4sgn 15681 sinq12gt0 15682 cosq23lt0 15685 coseq00topi 15687 tangtx 15690 sincos4thpi 15692 sincos6thpi 15694 sincos3rdpi 15695 pigt3 15696 abssinper 15698 coskpi 15700 cosq34lt1 15702 logsqrt 15775 2logb9irrALT 15826 1sgm2ppw 15850 perfect1 15853 perfectlem1 15854 perfectlem2 15855 perfect 15856 lgsdir2lem2 15889 gausslemma2dlem6 15927 lgsquadlem1 15937 lgsquadlem2 15938 lgsquad2lem2 15942 m1lgs 15945 2lgslem3a 15953 2lgslem3b 15954 2lgslem3c 15955 2lgslem3d 15956 2lgsoddprmlem2 15966 2lgsoddprmlem3c 15969 2lgsoddprmlem3d 15970 clwwlknonex2 16421 ex-fl 16480 ex-ceil 16481 ex-exp 16482 ex-fac 16483 |
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