| 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 8118 | . . . 4 ⊢ 1 ∈ ℂ | |
| 2 | 8re 9221 | . . . . 5 ⊢ 8 ∈ ℝ | |
| 3 | 2 | recni 8184 | . . . 4 ⊢ 8 ∈ ℂ |
| 4 | 4cn 9214 | . . . 4 ⊢ 4 ∈ ℂ | |
| 5 | 3cn 9211 | . . . 4 ⊢ 3 ∈ ℂ | |
| 6 | 8pos 9239 | . . . . 5 ⊢ 0 < 8 | |
| 7 | 2, 6 | gt0ap0ii 8801 | . . . 4 ⊢ 8 # 0 |
| 8 | 3re 9210 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 9 | 3pos 9230 | . . . . 5 ⊢ 0 < 3 | |
| 10 | 8, 9 | gt0ap0ii 8801 | . . . 4 ⊢ 3 # 0 |
| 11 | 1, 3, 4, 5, 7, 10 | divmuldivapi 8945 | . . 3 ⊢ ((1 / 8) · (4 / 3)) = ((1 · 4) / (8 · 3)) |
| 12 | 1, 4 | mulcomi 8178 | . . . 4 ⊢ (1 · 4) = (4 · 1) |
| 13 | 2cn 9207 | . . . . . . . 8 ⊢ 2 ∈ ℂ | |
| 14 | 4, 13, 5 | mul32i 8319 | . . . . . . 7 ⊢ ((4 · 2) · 3) = ((4 · 3) · 2) |
| 15 | 4t2e8 9295 | . . . . . . . 8 ⊢ (4 · 2) = 8 | |
| 16 | 15 | oveq1i 6023 | . . . . . . 7 ⊢ ((4 · 2) · 3) = (8 · 3) |
| 17 | 14, 16 | eqtr3i 2252 | . . . . . 6 ⊢ ((4 · 3) · 2) = (8 · 3) |
| 18 | 4, 5, 13 | mulassi 8181 | . . . . . 6 ⊢ ((4 · 3) · 2) = (4 · (3 · 2)) |
| 19 | 17, 18 | eqtr3i 2252 | . . . . 5 ⊢ (8 · 3) = (4 · (3 · 2)) |
| 20 | 3t2e6 9293 | . . . . . 6 ⊢ (3 · 2) = 6 | |
| 21 | 20 | oveq2i 6024 | . . . . 5 ⊢ (4 · (3 · 2)) = (4 · 6) |
| 22 | 19, 21 | eqtri 2250 | . . . 4 ⊢ (8 · 3) = (4 · 6) |
| 23 | 12, 22 | oveq12i 6025 | . . 3 ⊢ ((1 · 4) / (8 · 3)) = ((4 · 1) / (4 · 6)) |
| 24 | 11, 23 | eqtri 2250 | . 2 ⊢ ((1 / 8) · (4 / 3)) = ((4 · 1) / (4 · 6)) |
| 25 | 6re 9217 | . . . 4 ⊢ 6 ∈ ℝ | |
| 26 | 25 | recni 8184 | . . 3 ⊢ 6 ∈ ℂ |
| 27 | 6pos 9237 | . . . 4 ⊢ 0 < 6 | |
| 28 | 25, 27 | gt0ap0ii 8801 | . . 3 ⊢ 6 # 0 |
| 29 | 4re 9213 | . . . 4 ⊢ 4 ∈ ℝ | |
| 30 | 4pos 9233 | . . . 4 ⊢ 0 < 4 | |
| 31 | 29, 30 | gt0ap0ii 8801 | . . 3 ⊢ 4 # 0 |
| 32 | divcanap5 8887 | . . . 4 ⊢ ((1 ∈ ℂ ∧ (6 ∈ ℂ ∧ 6 # 0) ∧ (4 ∈ ℂ ∧ 4 # 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) | |
| 33 | 1, 32 | mp3an1 1358 | . . 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 2250 | 1 ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 = wceq 1395 ∈ wcel 2200 class class class wbr 4086 (class class class)co 6013 ℂcc 8023 0cc0 8025 1c1 8026 · cmul 8030 # cap 8754 / cdiv 8845 2c2 9187 3c3 9188 4c4 9189 6c6 9191 8c8 9193 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-cnex 8116 ax-resscn 8117 ax-1cn 8118 ax-1re 8119 ax-icn 8120 ax-addcl 8121 ax-addrcl 8122 ax-mulcl 8123 ax-mulrcl 8124 ax-addcom 8125 ax-mulcom 8126 ax-addass 8127 ax-mulass 8128 ax-distr 8129 ax-i2m1 8130 ax-0lt1 8131 ax-1rid 8132 ax-0id 8133 ax-rnegex 8134 ax-precex 8135 ax-cnre 8136 ax-pre-ltirr 8137 ax-pre-ltwlin 8138 ax-pre-lttrn 8139 ax-pre-apti 8140 ax-pre-ltadd 8141 ax-pre-mulgt0 8142 ax-pre-mulext 8143 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rmo 2516 df-rab 2517 df-v 2802 df-sbc 3030 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-id 4388 df-po 4391 df-iso 4392 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-iota 5284 df-fun 5326 df-fv 5332 df-riota 5966 df-ov 6016 df-oprab 6017 df-mpo 6018 df-pnf 8209 df-mnf 8210 df-xr 8211 df-ltxr 8212 df-le 8213 df-sub 8345 df-neg 8346 df-reap 8748 df-ap 8755 df-div 8846 df-2 9195 df-3 9196 df-4 9197 df-5 9198 df-6 9199 df-7 9200 df-8 9201 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |