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Mirrors > Home > MPE Home > Th. List > halfcn | Structured version Visualization version GIF version |
Description: One-half is complex. (Contributed by David A. Wheeler, 8-Dec-2018.) |
Ref | Expression |
---|---|
halfcn | ⊢ (1 / 2) ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2cn 10968 | . 2 ⊢ 2 ∈ ℂ | |
2 | 2ne0 10990 | . 2 ⊢ 2 ≠ 0 | |
3 | 1, 2 | reccli 10634 | 1 ⊢ (1 / 2) ∈ ℂ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 (class class class)co 6549 ℂcc 9813 1c1 9816 / cdiv 10563 2c2 10947 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-po 4959 df-so 4960 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-2 10956 |
This theorem is referenced by: halfpm6th 11130 rddif 13928 geo2sum 14443 geo2lim 14445 geoihalfsum 14453 bpoly1 14621 bpoly2 14627 bpoly3 14628 efcllem 14647 ege2le3 14659 efival 14721 flodddiv4 14975 pcoass 22632 iscmet3lem3 22896 mbfi1fseqlem6 23293 dvmptre 23538 aaliou3lem2 23902 aaliou3lem3 23903 sincos4thpi 24069 cxpsqrt 24249 dvsqrt 24283 dvcnsqrt 24285 resqrtcn 24290 ang180lem3 24341 heron 24365 efiatan 24439 efiatan2 24444 gausslemma2dlem1a 24890 ipdirilem 27068 mayete3i 27971 opsqrlem6 28388 dnibndlem3 31640 dnibndlem6 31643 cntotbnd 32765 stirlinglem1 38967 dirkerper 38989 dirkertrigeqlem3 38993 dirkeritg 38995 dirkercncflem2 38997 fourierdlem18 39018 fourierdlem57 39056 fourierdlem58 39057 fourierdlem62 39061 fourierdlem103 39102 fourierdlem104 39103 0nodd 41600 |
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