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| Mirrors > Home > MPE Home > Th. List > halfcl | Structured version Visualization version GIF version | ||
| Description: Closure of half of a number. (Contributed by NM, 1-Jan-2006.) |
| Ref | Expression |
|---|---|
| halfcl | ⊢ (𝐴 ∈ ℂ → (𝐴 / 2) ∈ ℂ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 12319 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | 2ne0 12350 | . 2 ⊢ 2 ≠ 0 | |
| 3 | divcl 11881 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → (𝐴 / 2) ∈ ℂ) | |
| 4 | 1, 2, 3 | mp3an23 1480 | 1 ⊢ (𝐴 ∈ ℂ → (𝐴 / 2) ∈ ℂ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2150 ≠ wne 2965 (class class class)co 7414 ℂcc 11101 0cc0 11103 / cdiv 11874 2c2 12298 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 ax-resscn 11160 ax-1cn 11161 ax-icn 11162 ax-addcl 11163 ax-addrcl 11164 ax-mulcl 11165 ax-mulrcl 11166 ax-mulcom 11167 ax-addass 11168 ax-mulass 11169 ax-distr 11170 ax-i2m1 11171 ax-1ne0 11172 ax-1rid 11173 ax-rnegex 11174 ax-rrecex 11175 ax-cnre 11176 ax-pre-lttri 11177 ax-pre-lttrn 11178 ax-pre-ltadd 11179 ax-pre-mulgt0 11180 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-nel 3072 df-ral 3087 df-rex 3097 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7866 df-2nd 7990 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8697 df-en 8947 df-dom 8948 df-sdom 8949 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11446 df-neg 11447 df-div 11875 df-nn 12237 df-2 12306 |
| This theorem is referenced by: halfaddsubcl 12479 subhalfhalf 12481 halfcld 12492 geo2sum 15930 efhalfpi 26616 cosq14gt0 26655 cosq14ge0 26656 abssinper 26666 coseq1 26670 efeq1 26673 sqrtcn 26895 1cubr 26987 dquartlem1 26996 acosf 27019 atanf 27025 acosneg 27032 acoscos 27038 acos1 27040 sinacos 27050 atanneg 27052 atancj 27055 efiatan 27057 efiatan2 27062 2efiatan 27063 atantan 27068 atanbndlem 27070 dvatan 27080 atantayl 27082 gausslemma2dlem1a 27509 minvecolem2 31197 sin2h 38209 cos2h 38210 dirkercncflem2 46770 fourierdlem58 46830 tannpoly 47576 |
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