| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > divdiv1 | Structured version Visualization version GIF version | ||
| Description: Division into a fraction. (Contributed by NM, 31-Dec-2007.) |
| Ref | Expression |
|---|---|
| divdiv1 | ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ≠ 0)) → ((𝐴 / 𝐵) / 𝐶) = (𝐴 / (𝐵 · 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11261 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 2 | ax-1ne0 11272 | . . . . 5 ⊢ 1 ≠ 0 | |
| 3 | 1, 2 | pm3.2i 476 | . . . 4 ⊢ (1 ∈ ℂ ∧ 1 ≠ 0) |
| 4 | divdivdiv 12021 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) ∧ ((𝐶 ∈ ℂ ∧ 𝐶 ≠ 0) ∧ (1 ∈ ℂ ∧ 1 ≠ 0))) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 · 1) / (𝐵 · 𝐶))) | |
| 5 | 3, 4 | mpanr2 717 | . . 3 ⊢ (((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ≠ 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 · 1) / (𝐵 · 𝐶))) |
| 6 | 5 | 3impa 1127 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ≠ 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 · 1) / (𝐵 · 𝐶))) |
| 7 | div1 12009 | . . . . 5 ⊢ (𝐶 ∈ ℂ → (𝐶 / 1) = 𝐶) | |
| 8 | 7 | oveq2d 7436 | . . . 4 ⊢ (𝐶 ∈ ℂ → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 / 𝐵) / 𝐶)) |
| 9 | 8 | ad2antrl 741 | . . 3 ⊢ (((𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ≠ 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 / 𝐵) / 𝐶)) |
| 10 | 9 | 3adant1 1148 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ≠ 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 / 𝐵) / 𝐶)) |
| 11 | mulrid 11309 | . . . 4 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
| 12 | 11 | oveq1d 7435 | . . 3 ⊢ (𝐴 ∈ ℂ → ((𝐴 · 1) / (𝐵 · 𝐶)) = (𝐴 / (𝐵 · 𝐶))) |
| 13 | 12 | 3ad2ant1 1151 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ≠ 0)) → ((𝐴 · 1) / (𝐵 · 𝐶)) = (𝐴 / (𝐵 · 𝐶))) |
| 14 | 6, 10, 13 | 3eqtr3d 2803 | 1 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 ≠ 0)) → ((𝐴 / 𝐵) / 𝐶) = (𝐴 / (𝐵 · 𝐶))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∧ w3a 1103 = wceq 1569 ∈ wcel 2144 ≠ wne 2955 (class class class)co 7420 ℂcc 11201 0cc0 11203 1c1 11204 · cmul 11208 / cdiv 11976 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-po 5558 df-so 5559 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-er 8720 df-en 8977 df-dom 8978 df-sdom 8979 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-div 11977 |
| This theorem is used by: recdiv2 12033 divdiv1d 12127 fldiv4lem1div2uz2 13979 fldiv2 14004 sin01bnd 16358 flodddiv4t2lthalf 16593 pythagtriplem12 17009 pythagtriplem14 17011 pythagtriplem16 17013 coseq1 26858 efeq1 26861 ang180lem1 27142 atan1 27261 fsumdvdscom 27517 bposlem8 27623 gausslemma2dlem3 27700 2lgslem1a2 27722 rplogsumlem2 27817 dchrvmasum2lem 27828 dchrisum0lem2 27850 dchrisum0lem3 27851 mulogsum 27864 mulog2sumlem2 27867 pntlemr 27934 pntlemf 27937 hgt750lem 35326 quad3 36521 wallispilem4 47171 dirkertrigeqlem3 47203 dirkercncflem1 47206 fourierswlem 47333 dignn0flhalflem2 49821 dignn0ehalf 49822 |
| Copyright terms: Public domain | W3C validator |