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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 12448 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | 2ne0 12479 | . 2 ⊢ 2 ≠ 0 | |
| 3 | 1, 2 | reccli 12077 | 1 ⊢ (1 / 2) ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 (class class class)co 7446 ℂcc 11228 1c1 11231 / cdiv 12003 2c2 12427 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-resscn 11287 ax-1cn 11288 ax-icn 11289 ax-addcl 11290 ax-addrcl 11291 ax-mulcl 11292 ax-mulrcl 11293 ax-mulcom 11294 ax-addass 11295 ax-mulass 11296 ax-distr 11297 ax-i2m1 11298 ax-1ne0 11299 ax-1rid 11300 ax-rnegex 11301 ax-rrecex 11302 ax-cnre 11303 ax-pre-lttri 11304 ax-pre-lttrn 11305 ax-pre-ltadd 11306 ax-pre-mulgt0 11307 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6325 df-ord 6386 df-on 6387 df-lim 6388 df-suc 6389 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7403 df-ov 7449 df-oprab 7450 df-mpo 7451 df-om 7905 df-2nd 8029 df-frecs 8330 df-wrecs 8361 df-recs 8410 df-rdg 8449 df-er 8748 df-en 9005 df-dom 9006 df-sdom 9007 df-pnf 11375 df-mnf 11376 df-xr 11377 df-ltxr 11378 df-le 11379 df-sub 11573 df-neg 11574 df-div 12004 df-nn 12366 df-2 12435 |
| This theorem is used by: 1mhlfehlf 12595 halfpm6th 12598 rddif 15540 geo2sum 16074 geo2lim 16076 geoihalfsum 16083 bpoly1 16249 bpoly2 16255 bpoly3 16256 bpoly4 16257 efcllem 16275 ege2le3 16288 efival 16352 flodddiv4 16617 pcoass 25378 iscmet3lem3 25644 mbfi1fseqlem6 26074 dvmptre 26322 aaliou3lem2 26703 aaliou3lem3 26704 sincos4thpi 26875 cxpsqrt 27064 dvsqrt 27103 dvcnsqrt 27105 resqrtcn 27110 ang180lem3 27172 heron 27199 efiatan 27273 efiatan2 27278 gausslemma2dlem1a 27725 ipdirilem 31464 mayete3i 32363 opsqrlem6 32780 dnibndlem3 37537 dnibndlem6 37540 cntotbnd 38933 stirlinglem1 47299 dirkerper 47321 dirkertrigeqlem3 47325 dirkeritg 47327 dirkercncflem2 47329 fourierdlem18 47350 fourierdlem57 47388 fourierdlem58 47389 fourierdlem62 47393 fourierdlem103 47434 fourierdlem104 47435 goldrasin 48144 0nodd 49482 |
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