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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 12344 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | 2ne0 12375 | . 2 ⊢ 2 ≠ 0 | |
| 3 | 1, 2 | reccli 11973 | 1 ⊢ (1 / 2) ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 (class class class)co 7417 ℂcc 11126 1c1 11129 / cdiv 11899 2c2 12323 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-addrcl 11189 ax-mulcl 11190 ax-mulrcl 11191 ax-mulcom 11192 ax-addass 11193 ax-mulass 11194 ax-distr 11195 ax-i2m1 11196 ax-1ne0 11197 ax-1rid 11198 ax-rnegex 11199 ax-rrecex 11200 ax-cnre 11201 ax-pre-lttri 11202 ax-pre-lttrn 11203 ax-pre-ltadd 11204 ax-pre-mulgt0 11205 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-om 7867 df-2nd 7991 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8957 df-dom 8958 df-sdom 8959 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-div 11900 df-nn 12262 df-2 12331 |
| This theorem is used by: 1mhlfehlf 12491 halfpm6th 12494 rddif 15432 geo2sum 15966 geo2lim 15968 geoihalfsum 15975 bpoly1 16143 bpoly2 16149 bpoly3 16150 bpoly4 16151 efcllem 16169 ege2le3 16182 efival 16246 flodddiv4 16511 pcoass 25258 iscmet3lem3 25524 mbfi1fseqlem6 25954 dvmptre 26203 aaliou3lem2 26586 aaliou3lem3 26587 sincos4thpi 26758 cxpsqrt 26948 dvsqrt 26987 dvcnsqrt 26989 resqrtcn 26994 ang180lem3 27056 heron 27083 efiatan 27157 efiatan2 27162 gausslemma2dlem1a 27609 ipdirilem 31318 mayete3i 32217 opsqrlem6 32634 dnibndlem3 37185 dnibndlem6 37188 cntotbnd 38554 stirlinglem1 46910 dirkerper 46932 dirkertrigeqlem3 46936 dirkeritg 46938 dirkercncflem2 46940 fourierdlem18 46961 fourierdlem57 46999 fourierdlem58 47000 fourierdlem62 47004 fourierdlem103 47045 fourierdlem104 47046 goldrasin 47755 0nodd 49093 |
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