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| Mirrors > Home > MPE Home > Th. List > divne0d | Structured version Visualization version GIF version | ||
| Description: The ratio of nonzero numbers is nonzero. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| div1d.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| divcld.2 | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| divne0d.3 | ⊢ (𝜑 → 𝐴 ≠ 0) |
| divne0d.4 | ⊢ (𝜑 → 𝐵 ≠ 0) |
| Ref | Expression |
|---|---|
| divne0d | ⊢ (𝜑 → (𝐴 / 𝐵) ≠ 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | div1d.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | divne0d.3 | . 2 ⊢ (𝜑 → 𝐴 ≠ 0) | |
| 3 | divcld.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
| 4 | divne0d.4 | . 2 ⊢ (𝜑 → 𝐵 ≠ 0) | |
| 5 | divne0 12016 | . 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) → (𝐴 / 𝐵) ≠ 0) | |
| 6 | 1, 2, 3, 4, 5 | syl22anc 852 | 1 ⊢ (𝜑 → (𝐴 / 𝐵) ≠ 0) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2147 ≠ wne 2959 (class class class)co 7446 ℂcc 11228 0cc0 11230 / cdiv 12003 |
| 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-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-br 5107 df-opab 5172 df-mpt 5191 df-id 5551 df-po 5564 df-so 5565 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-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-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 |
| This theorem is used by: ntrivcvgtail 16101 tanval3 16334 lcmgcdlem 16813 pcdiv 17062 pcqdiv 17067 sylow1lem1 19845 fincygsubgodd 20361 i1fmulc 26057 itg1mulc 26058 dvcnvlem 26329 plydivlem4 26650 tanarg 26980 logcnlem4 27006 angcld 27166 angrteqvd 27167 cosangneg2d 27168 angrtmuld 27169 ang180lem1 27170 ang180lem2 27171 ang180lem3 27172 ang180lem4 27173 ang180lem5 27174 lawcoslem1 27176 lawcos 27177 isosctrlem2 27180 isosctrlem3 27181 angpieqvdlem2 27190 mcubic 27208 cubic2 27209 cubic 27210 quartlem4 27221 tanatan 27280 dmgmdivn0 27388 lgamgulmlem2 27390 gamcvg2lem 27419 nrt2irr 31107 constrrtlc1 34447 qqhval2lem 34696 iprodgam 36698 recbothd 43245 aks4d1p1p7 43327 aks6d1c2p2 43372 unitscyglem2 43449 pellexlem6 44045 bccm1k 45529 ioodvbdlimc1lem2 47157 ioodvbdlimc2lem 47159 wallispilem4 47293 stirlinglem1 47299 stirlinglem3 47301 stirlinglem4 47302 stirlinglem7 47305 stirlinglem13 47311 stirlinglem14 47312 stirlinglem15 47313 |
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