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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 9327 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 8302 | 1 ⊢ 2 ∈ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2205 ℂcc 8141 2c2 9308 |
| 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 8235 ax-1re 8237 ax-addrcl 8240 |
| 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 3220 df-ss 3227 df-2 9316 |
| This theorem is referenced by: 2ex 9329 2cnd 9330 2m1e1 9375 3m1e2 9377 2p2e4 9384 times2 9386 2div2e1 9390 1p2e3 9392 3p3e6 9400 4p3e7 9402 5p3e8 9405 6p3e9 9408 2t1e2 9411 2t2e4 9412 3t3e9 9415 2t0e0 9417 4d2e2 9418 2cnne0 9467 1mhlfehlf 9476 8th4div3 9477 halfpm6th 9478 2mulicn 9480 2muliap0 9482 halfcl 9484 half0 9486 2halves 9487 halfaddsub 9492 div4p1lem1div2 9512 3halfnz 9696 zneo 9700 nneoor 9701 zeo 9704 7p3e10 9804 4t4e16 9828 6t3e18 9834 7t7e49 9843 8t5e40 9847 9t9e81 9858 decbin0 9869 decbin2 9870 halfthird 9872 fztpval 10442 fz0tp 10481 fz0to4untppr 10483 fzo0to3tp 10589 2tnp1ge0ge0 10688 fldiv4lem1div2 10694 expubnd 10985 sq2 11024 sq4e2t8 11026 cu2 11027 subsq2 11036 binom2sub 11042 binom3 11046 zesq 11048 fac2 11121 fac3 11122 faclbnd2 11132 bcn2 11154 4bc2eq6 11165 crre 11570 addcj 11604 imval2 11607 resqrexlemover 11723 resqrexlemcalc1 11727 resqrexlemnm 11731 resqrexlemcvg 11732 amgm2 11831 arisum 12212 arisum2 12213 geo2sum2 12229 geo2lim 12230 geoihalfsum 12236 efcllemp 12372 ege2le3 12385 tanval2ap 12427 tanval3ap 12428 efi4p 12431 efival 12446 sinadd 12450 cosadd 12451 sinmul 12458 cosmul 12459 cos2tsin 12465 ef01bndlem 12470 sin01bnd 12471 cos01bnd 12472 cos1bnd 12473 cos2bnd 12474 cos01gt0 12477 sin02gt0 12478 sin4lt0 12481 cos12dec 12482 egt2lt3 12494 odd2np1lem 12586 odd2np1 12587 ltoddhalfle 12607 halfleoddlt 12608 opoe 12609 omoe 12610 opeo 12611 omeo 12612 nno 12620 nn0o 12621 flodddiv4 12650 bits0 12662 bitsfzolem 12668 0bits 12673 bitsinv1 12676 6gcd4e2 12719 3lcm2e6woprm 12811 6lcm4e12 12812 sqrt2irrlem 12886 oddpwdclemodd 12897 pythagtriplem1 12991 pythagtriplem12 13001 pythagtriplem14 13003 4sqlem11 13127 4sqlem12 13128 dec5dvds 13138 dec2nprm 13141 2exp5 13158 2exp6 13159 2exp7 13160 2exp8 13161 2exp11 13162 2exp16 13163 ballotfilem2 13175 ballotfilemth 13228 maxcncf 15609 mincncf 15610 coscn 15764 sinhalfpilem 15785 cospi 15794 ef2pi 15799 ef2kpi 15800 efper 15801 sinperlem 15802 sin2kpi 15805 cos2kpi 15806 sin2pim 15807 cos2pim 15808 ptolemy 15818 sincosq3sgn 15822 sincosq4sgn 15823 sinq12gt0 15824 cosq23lt0 15827 coseq00topi 15829 tangtx 15832 sincos4thpi 15834 sincos6thpi 15836 sincos3rdpi 15837 pigt3 15838 abssinper 15840 coskpi 15842 cosq34lt1 15844 logsqrt 15917 2logb9irrALT 15968 1sgm2ppw 15992 perfect1 15995 perfectlem1 15996 perfectlem2 15997 perfect 15998 lgsdir2lem2 16031 gausslemma2dlem6 16069 lgsquadlem1 16079 lgsquadlem2 16080 lgsquad2lem2 16084 m1lgs 16087 2lgslem3a 16095 2lgslem3b 16096 2lgslem3c 16097 2lgslem3d 16098 2lgsoddprmlem2 16108 2lgsoddprmlem3c 16111 2lgsoddprmlem3d 16112 clwwlknonex2 16563 ex-fl 16622 ex-ceil 16623 ex-exp 16624 ex-fac 16625 |
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