| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 8th4div3 | 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 8225 | . . . 4 ⊢ 1 ∈ ℂ | |
| 2 | 8re 9327 | . . . . 5 ⊢ 8 ∈ ℝ | |
| 3 | 2 | recni 8291 | . . . 4 ⊢ 8 ∈ ℂ |
| 4 | 4cn 9320 | . . . 4 ⊢ 4 ∈ ℂ | |
| 5 | 3cn 9317 | . . . 4 ⊢ 3 ∈ ℂ | |
| 6 | 8pos 9345 | . . . . 5 ⊢ 0 < 8 | |
| 7 | 2, 6 | gt0ap0ii 8907 | . . . 4 ⊢ 8 # 0 |
| 8 | 3re 9316 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 9 | 3pos 9336 | . . . . 5 ⊢ 0 < 3 | |
| 10 | 8, 9 | gt0ap0ii 8907 | . . . 4 ⊢ 3 # 0 |
| 11 | 1, 3, 4, 5, 7, 10 | divmuldivapi 9051 | . . 3 ⊢ ((1 / 8) · (4 / 3)) = ((1 · 4) / (8 · 3)) |
| 12 | 1, 4 | mulcomi 8285 | . . . 4 ⊢ (1 · 4) = (4 · 1) |
| 13 | 2cn 9313 | . . . . . . . 8 ⊢ 2 ∈ ℂ | |
| 14 | 4, 13, 5 | mul32i 8425 | . . . . . . 7 ⊢ ((4 · 2) · 3) = ((4 · 3) · 2) |
| 15 | 4t2e8 9401 | . . . . . . . 8 ⊢ (4 · 2) = 8 | |
| 16 | 15 | oveq1i 6062 | . . . . . . 7 ⊢ ((4 · 2) · 3) = (8 · 3) |
| 17 | 14, 16 | eqtr3i 2257 | . . . . . 6 ⊢ ((4 · 3) · 2) = (8 · 3) |
| 18 | 4, 5, 13 | mulassi 8288 | . . . . . 6 ⊢ ((4 · 3) · 2) = (4 · (3 · 2)) |
| 19 | 17, 18 | eqtr3i 2257 | . . . . 5 ⊢ (8 · 3) = (4 · (3 · 2)) |
| 20 | 3t2e6 9399 | . . . . . 6 ⊢ (3 · 2) = 6 | |
| 21 | 20 | oveq2i 6063 | . . . . 5 ⊢ (4 · (3 · 2)) = (4 · 6) |
| 22 | 19, 21 | eqtri 2255 | . . . 4 ⊢ (8 · 3) = (4 · 6) |
| 23 | 12, 22 | oveq12i 6064 | . . 3 ⊢ ((1 · 4) / (8 · 3)) = ((4 · 1) / (4 · 6)) |
| 24 | 11, 23 | eqtri 2255 | . 2 ⊢ ((1 / 8) · (4 / 3)) = ((4 · 1) / (4 · 6)) |
| 25 | 6re 9323 | . . . 4 ⊢ 6 ∈ ℝ | |
| 26 | 25 | recni 8291 | . . 3 ⊢ 6 ∈ ℂ |
| 27 | 6pos 9343 | . . . 4 ⊢ 0 < 6 | |
| 28 | 25, 27 | gt0ap0ii 8907 | . . 3 ⊢ 6 # 0 |
| 29 | 4re 9319 | . . . 4 ⊢ 4 ∈ ℝ | |
| 30 | 4pos 9339 | . . . 4 ⊢ 0 < 4 | |
| 31 | 29, 30 | gt0ap0ii 8907 | . . 3 ⊢ 4 # 0 |
| 32 | divcanap5 8993 | . . . 4 ⊢ ((1 ∈ ℂ ∧ (6 ∈ ℂ ∧ 6 # 0) ∧ (4 ∈ ℂ ∧ 4 # 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) | |
| 33 | 1, 32 | mp3an1 1361 | . . 3 ⊢ (((6 ∈ ℂ ∧ 6 # 0) ∧ (4 ∈ ℂ ∧ 4 # 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) |
| 34 | 26, 28, 4, 31, 33 | mp4an 427 | . 2 ⊢ ((4 · 1) / (4 · 6)) = (1 / 6) |
| 35 | 24, 34 | eqtri 2255 | 1 ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 = wceq 1398 ∈ wcel 2205 class class class wbr 4111 (class class class)co 6052 ℂcc 8130 0cc0 8132 1c1 8133 · cmul 8137 # cap 8860 / cdiv 8951 2c2 9293 3c3 9294 4c4 9295 6c6 9297 8c8 9299 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 ax-pr 4324 ax-un 4556 ax-setind 4661 ax-cnex 8223 ax-resscn 8224 ax-1cn 8225 ax-1re 8226 ax-icn 8227 ax-addcl 8228 ax-addrcl 8229 ax-mulcl 8230 ax-mulrcl 8231 ax-addcom 8232 ax-mulcom 8233 ax-addass 8234 ax-mulass 8235 ax-distr 8236 ax-i2m1 8237 ax-0lt1 8238 ax-1rid 8239 ax-0id 8240 ax-rnegex 8241 ax-precex 8242 ax-cnre 8243 ax-pre-ltirr 8244 ax-pre-ltwlin 8245 ax-pre-lttrn 8246 ax-pre-apti 8247 ax-pre-ltadd 8248 ax-pre-mulgt0 8249 ax-pre-mulext 8250 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rmo 2530 df-rab 2531 df-v 2817 df-sbc 3045 df-dif 3215 df-un 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-br 4112 df-opab 4174 df-id 4416 df-po 4419 df-iso 4420 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-iota 5314 df-fun 5356 df-fv 5362 df-riota 6005 df-ov 6055 df-oprab 6056 df-mpo 6057 df-pnf 8315 df-mnf 8316 df-xr 8317 df-ltxr 8318 df-le 8319 df-sub 8451 df-neg 8452 df-reap 8854 df-ap 8861 df-div 8952 df-2 9301 df-3 9302 df-4 9303 df-5 9304 df-6 9305 df-7 9306 df-8 9307 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |