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| Mirrors > Home > MPE Home > Th. List > halfcn | Structured version Visualization version GIF version | ||
| Description: One-half is a complex number. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| halfcn | ⊢ (1 / 2) ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 12399 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | 2ne0 12430 | . 2 ⊢ 2 ≠ 0 | |
| 3 | 1, 2 | reccli 12028 | 1 ⊢ (1 / 2) ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 (class class class)co 7412 ℂcc 11179 1c1 11182 / cdiv 11954 2c2 12378 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8701 df-en 8958 df-dom 8959 df-sdom 8960 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-div 11955 df-nn 12317 df-2 12386 |
| This theorem is used by: 1mhlfehlf 12546 halfpm6th 12549 rddif 15488 geo2sum 16022 geo2lim 16024 geoihalfsum 16031 bpoly1 16197 bpoly2 16203 bpoly3 16204 bpoly4 16205 efcllem 16223 ege2le3 16236 efival 16300 flodddiv4 16565 pcoass 25325 iscmet3lem3 25591 mbfi1fseqlem6 26021 dvmptre 26269 aaliou3lem2 26652 aaliou3lem3 26653 sincos4thpi 26824 cxpsqrt 27013 dvsqrt 27052 dvcnsqrt 27054 resqrtcn 27059 ang180lem3 27121 heron 27148 efiatan 27222 efiatan2 27227 gausslemma2dlem1a 27674 ipdirilem 31413 mayete3i 32312 opsqrlem6 32729 dnibndlem3 37316 dnibndlem6 37319 cntotbnd 38698 stirlinglem1 47028 dirkerper 47050 dirkertrigeqlem3 47054 dirkeritg 47056 dirkercncflem2 47058 fourierdlem18 47079 fourierdlem57 47117 fourierdlem58 47118 fourierdlem62 47122 fourierdlem103 47163 fourierdlem104 47164 goldrasin 47873 0nodd 49211 |
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