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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 9384 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 8345 | 1 ⊢ 2 ∈ ℂ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 ℂcc 8184 2c2 9365 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-resscn 8278 ax-1re 8280 ax-addrcl 8283 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 df-2 9373 |
| This theorem is used by: 2ex 9386 2cnd 9387 2m1e1 9432 3m1e2 9434 2p2e4 9441 times2 9443 2div2e1 9447 1p2e3 9449 3p3e6 9457 4p3e7 9459 5p3e8 9462 6p3e9 9465 2t1e2 9468 2t2e4 9469 2t3e6 9472 3t3e9 9473 2t4e8 9475 2t0e0 9476 4d2e2 9477 2cnne0 9526 1mhlfehlf 9535 8th4div3 9536 halfpm6th 9537 2mulicn 9539 2muliap0 9541 halfcl 9543 half0 9545 2halves 9546 halfaddsub 9551 div4p1lem1div2 9571 3halfnz 9755 zneo 9759 nneoor 9760 zeo 9763 7p3e10 9868 4t4e16 9892 6t3e18 9898 7t7e49 9907 8t5e40 9911 9t9e81 9922 decbin0 9933 decbin2 9934 halfthird 9936 fztpval 10508 fz0tp 10547 fz0to4untppr 10549 fzo0to3tp 10655 2tnp1ge0ge0 10758 fldiv4lem1div2 10764 expubnd 11055 sq2 11094 sq4e2t8 11096 cu2 11097 subsq2 11106 binom2sub 11112 binom3 11116 zesq 11118 fac2 11192 fac3 11193 faclbnd2 11203 bcn2 11225 4bc2eq6 11236 crre 11645 addcj 11679 imval2 11682 resqrexlemover 11799 resqrexlemcalc1 11803 resqrexlemnm 11807 resqrexlemcvg 11808 amgm2 11908 arisum 12291 arisum2 12292 geo2sum2 12308 geo2lim 12309 geoihalfsum 12315 efcllemp 12451 ege2le3 12464 tanval2ap 12506 tanval3ap 12507 efi4p 12510 efival 12525 sinadd 12529 cosadd 12530 sinmul 12537 cosmul 12538 cos2tsin 12544 ef01bndlem 12549 sin01bnd 12550 cos01bnd 12551 cos1bnd 12552 cos2bnd 12553 cos01gt0 12556 sin02gt0 12557 sin4lt0 12560 cos12dec 12561 egt2lt3 12573 odd2np1lem 12665 odd2np1 12666 ltoddhalfle 12686 halfleoddlt 12687 opoe 12688 omoe 12689 opeo 12690 omeo 12691 nno 12699 nn0o 12700 flodddiv4 12729 bits0 12741 bitsfzolem 12747 0bits 12752 bitsinv1 12755 6gcd4e2 12798 3lcm2e6woprm 12890 6lcm4e12 12891 sqrt2irrlem 12966 pythagtriplem1 13074 pythagtriplem12 13084 pythagtriplem14 13086 4sqlem11 13210 4sqlem12 13211 dec5dvds 13221 dec2nprm 13224 2exp5 13242 2exp6 13243 2exp7 13244 2exp8 13245 2exp11 13246 2exp16 13247 10nprm 13258 11prm 13259 13prm 13260 37prm 13265 43prm 13266 83prm 13267 139prm 13268 163prm 13269 317prm 13270 631prm 13271 1259lem1 13272 1259lem2 13273 1259lem3 13274 1259lem4 13275 1259lem5 13276 1259prm 13277 ballotfilem2 13287 ballotfilemth 13340 maxcncf 15853 mincncf 15854 coscn 16008 sinhalfpilem 16030 cospi 16039 ef2pi 16044 ef2kpi 16045 efper 16046 sinperlem 16047 sin2kpi 16050 cos2kpi 16051 sin2pim 16052 cos2pim 16053 ptolemy 16063 sincosq3sgn 16067 sincosq4sgn 16068 sinq12gt0 16069 cosq23lt0 16072 coseq00topi 16074 tangtx 16077 sincos4thpi 16079 sincos6thpi 16081 sincos3rdpi 16082 pigt3 16083 abssinper 16085 coskpi 16087 sineq0re 16088 cosq34lt1 16090 root1idef 16096 logsqrt 16170 efnthr 16188 2logb9irrALT 16222 log2tlbndlog2 16232 log2ublem2 16234 log2ublem3 16235 log2ublog2 16236 birthdaylog2 16240 1sgm2ppw 16301 ppiqub 16305 chtublem 16307 chtqub 16308 perfect1 16310 perfectlem1 16311 perfectlem2 16312 perfect 16313 bcmax 16317 bcp1ctr 16318 bclbnd 16319 bpos1lem 16321 bpos1 16322 bposlem1 16323 bposlem2 16324 bposlem4 16326 bposlem5 16327 bposlem6 16328 bposlem8 16330 bposlem9 16331 lgsdir2lem2 16365 gausslemma2dlem6 16403 lgsquadlem1 16413 lgsquadlem2 16414 lgsquad2lem2 16418 m1lgs 16421 2lgslem3a 16429 2lgslem3b 16430 2lgslem3c 16431 2lgslem3d 16432 2lgsoddprmlem2 16442 2lgsoddprmlem3c 16445 2lgsoddprmlem3d 16446 clwwlknonex2 16897 ex-fl 16956 ex-ceil 16957 ex-exp 16958 ex-fac 16959 |
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