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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 9383 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 1 | recni 8344 | 1 ⊢ 2 ∈ ℂ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 ℂcc 8183 2c2 9364 |
| 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 8277 ax-1re 8279 ax-addrcl 8282 |
| 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 9372 |
| This theorem is used by: 2ex 9385 2cnd 9386 2m1e1 9431 3m1e2 9433 2p2e4 9440 times2 9442 2div2e1 9446 1p2e3 9448 3p3e6 9456 4p3e7 9458 5p3e8 9461 6p3e9 9464 2t1e2 9467 2t2e4 9468 2t3e6 9471 3t3e9 9472 2t4e8 9474 2t0e0 9475 4d2e2 9476 2cnne0 9525 1mhlfehlf 9534 8th4div3 9535 halfpm6th 9536 2mulicn 9538 2muliap0 9540 halfcl 9542 half0 9544 2halves 9545 halfaddsub 9550 div4p1lem1div2 9570 3halfnz 9753 zneo 9757 nneoor 9758 zeo 9761 7p3e10 9866 4t4e16 9890 6t3e18 9896 7t7e49 9905 8t5e40 9909 9t9e81 9920 decbin0 9931 decbin2 9932 halfthird 9934 fztpval 10506 fz0tp 10545 fz0to4untppr 10547 fzo0to3tp 10653 2tnp1ge0ge0 10756 fldiv4lem1div2 10762 expubnd 11053 sq2 11092 sq4e2t8 11094 cu2 11095 subsq2 11104 binom2sub 11110 binom3 11114 zesq 11116 fac2 11190 fac3 11191 faclbnd2 11201 bcn2 11223 4bc2eq6 11234 crre 11643 addcj 11677 imval2 11680 resqrexlemover 11797 resqrexlemcalc1 11801 resqrexlemnm 11805 resqrexlemcvg 11806 amgm2 11906 arisum 12289 arisum2 12290 geo2sum2 12306 geo2lim 12307 geoihalfsum 12313 efcllemp 12449 ege2le3 12462 tanval2ap 12504 tanval3ap 12505 efi4p 12508 efival 12523 sinadd 12527 cosadd 12528 sinmul 12535 cosmul 12536 cos2tsin 12542 ef01bndlem 12547 sin01bnd 12548 cos01bnd 12549 cos1bnd 12550 cos2bnd 12551 cos01gt0 12554 sin02gt0 12555 sin4lt0 12558 cos12dec 12559 egt2lt3 12571 odd2np1lem 12663 odd2np1 12664 ltoddhalfle 12684 halfleoddlt 12685 opoe 12686 omoe 12687 opeo 12688 omeo 12689 nno 12697 nn0o 12698 flodddiv4 12727 bits0 12739 bitsfzolem 12745 0bits 12750 bitsinv1 12753 6gcd4e2 12796 3lcm2e6woprm 12888 6lcm4e12 12889 sqrt2irrlem 12964 pythagtriplem1 13072 pythagtriplem12 13082 pythagtriplem14 13084 4sqlem11 13208 4sqlem12 13209 dec5dvds 13219 dec2nprm 13222 2exp5 13240 2exp6 13241 2exp7 13242 2exp8 13243 2exp11 13244 2exp16 13245 10nprm 13256 11prm 13257 13prm 13258 37prm 13263 43prm 13264 83prm 13265 139prm 13266 163prm 13267 317prm 13268 631prm 13269 1259lem1 13270 1259lem2 13271 1259lem3 13272 1259lem4 13273 1259lem5 13274 1259prm 13275 ballotfilem2 13285 ballotfilemth 13338 maxcncf 15858 mincncf 15859 coscn 16013 sinhalfpilem 16035 cospi 16044 ef2pi 16049 ef2kpi 16050 efper 16051 sinperlem 16052 sin2kpi 16055 cos2kpi 16056 sin2pim 16057 cos2pim 16058 ptolemy 16068 sincosq3sgn 16072 sincosq4sgn 16073 sinq12gt0 16074 cosq23lt0 16077 coseq00topi 16079 tangtx 16082 sincos4thpi 16084 sincos6thpi 16086 sincos3rdpi 16087 pigt3 16088 abssinper 16090 coskpi 16092 sineq0re 16093 cosq34lt1 16095 root1idef 16101 logsqrt 16175 efnthr 16193 2logb9irrALT 16227 log2tlbndlog2 16237 log2ublem2 16239 log2ublem3 16240 log2ublog2 16241 birthdaylog2 16245 1sgm2ppw 16306 ppiqub 16310 chtublem 16312 chtqub 16313 perfect1 16315 perfectlem1 16316 perfectlem2 16317 perfect 16318 bcmax 16322 bcp1ctr 16323 bclbnd 16324 bpos1lem 16326 bpos1 16327 bposlem1 16328 bposlem2 16329 bposlem4 16331 bposlem5 16332 bposlem6 16333 bposlem8 16335 bposlem9 16336 lgsdir2lem2 16370 gausslemma2dlem6 16408 lgsquadlem1 16418 lgsquadlem2 16419 lgsquad2lem2 16423 m1lgs 16426 2lgslem3a 16434 2lgslem3b 16435 2lgslem3c 16436 2lgslem3d 16437 2lgsoddprmlem2 16447 2lgsoddprmlem3c 16450 2lgsoddprmlem3d 16451 clwwlknonex2 16902 ex-fl 16961 ex-ceil 16962 ex-exp 16963 ex-fac 16964 |
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