| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > 8th4div3 | Structured version Visualization version GIF version | ||
| Description: An eighth of four thirds is a sixth. (Contributed by Paul Chapman, 24-Nov-2007.) |
| Ref | Expression |
|---|---|
| 8th4div3 | ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11251 | . . . 4 ⊢ 1 ∈ ℂ | |
| 2 | 8cn 12433 | . . . 4 ⊢ 8 ∈ ℂ | |
| 3 | 4cn 12421 | . . . 4 ⊢ 4 ∈ ℂ | |
| 4 | 3cn 12417 | . . . 4 ⊢ 3 ∈ ℂ | |
| 5 | 8re 12432 | . . . . 5 ⊢ 8 ∈ ℝ | |
| 6 | 8pos 12451 | . . . . 5 ⊢ 0 < 8 | |
| 7 | 5, 6 | gt0ne0ii 11845 | . . . 4 ⊢ 8 ≠ 0 |
| 8 | 3ne0 12445 | . . . 4 ⊢ 3 ≠ 0 | |
| 9 | 1, 2, 3, 4, 7, 8 | divmuldivi 12070 | . . 3 ⊢ ((1 / 8) · (4 / 3)) = ((1 · 4) / (8 · 3)) |
| 10 | 1, 3 | mulcomi 11310 | . . . 4 ⊢ (1 · 4) = (4 · 1) |
| 11 | 2cn 12411 | . . . . . 6 ⊢ 2 ∈ ℂ | |
| 12 | 3, 11, 4 | mulassi 11313 | . . . . 5 ⊢ ((4 · 2) · 3) = (4 · (2 · 3)) |
| 13 | 4t2e8 12504 | . . . . . 6 ⊢ (4 · 2) = 8 | |
| 14 | 13 | oveq1i 7428 | . . . . 5 ⊢ ((4 · 2) · 3) = (8 · 3) |
| 15 | 2t3e6 12502 | . . . . . 6 ⊢ (2 · 3) = 6 | |
| 16 | 15 | oveq2i 7429 | . . . . 5 ⊢ (4 · (2 · 3)) = (4 · 6) |
| 17 | 12, 14, 16 | 3eqtr3i 2792 | . . . 4 ⊢ (8 · 3) = (4 · 6) |
| 18 | 10, 17 | oveq12i 7430 | . . 3 ⊢ ((1 · 4) / (8 · 3)) = ((4 · 1) / (4 · 6)) |
| 19 | 9, 18 | eqtri 2784 | . 2 ⊢ ((1 / 8) · (4 / 3)) = ((4 · 1) / (4 · 6)) |
| 20 | 6cn 12427 | . . 3 ⊢ 6 ∈ ℂ | |
| 21 | 6re 12426 | . . . 4 ⊢ 6 ∈ ℝ | |
| 22 | 6pos 12449 | . . . 4 ⊢ 0 < 6 | |
| 23 | 21, 22 | gt0ne0ii 11845 | . . 3 ⊢ 6 ≠ 0 |
| 24 | 4ne0 12447 | . . 3 ⊢ 4 ≠ 0 | |
| 25 | divcan5 12012 | . . . 4 ⊢ ((1 ∈ ℂ ∧ (6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) | |
| 26 | 1, 25 | mp3an1 1477 | . . 3 ⊢ (((6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) |
| 27 | 20, 23, 3, 24, 26 | mp4an 706 | . 2 ⊢ ((4 · 1) / (4 · 6)) = (1 / 6) |
| 28 | 19, 27 | eqtri 2784 | 1 ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 (class class class)co 7418 ℂcc 11191 0cc0 11193 1c1 11194 · cmul 11198 / cdiv 11966 2c2 12390 3c3 12391 4c4 12392 6c6 12394 8c8 12396 |
| 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 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 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 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-div 11967 df-nn 12329 df-2 12398 df-3 12399 df-4 12400 df-5 12401 df-6 12402 df-7 12403 df-8 12404 |
| This theorem is used by: (None) |
| Copyright terms: Public domain | W3C validator |