![]() |
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 7737 | . . . 4 ⊢ 1 ∈ ℂ | |
2 | 8re 8829 | . . . . 5 ⊢ 8 ∈ ℝ | |
3 | 2 | recni 7802 | . . . 4 ⊢ 8 ∈ ℂ |
4 | 4cn 8822 | . . . 4 ⊢ 4 ∈ ℂ | |
5 | 3cn 8819 | . . . 4 ⊢ 3 ∈ ℂ | |
6 | 8pos 8847 | . . . . 5 ⊢ 0 < 8 | |
7 | 2, 6 | gt0ap0ii 8414 | . . . 4 ⊢ 8 # 0 |
8 | 3re 8818 | . . . . 5 ⊢ 3 ∈ ℝ | |
9 | 3pos 8838 | . . . . 5 ⊢ 0 < 3 | |
10 | 8, 9 | gt0ap0ii 8414 | . . . 4 ⊢ 3 # 0 |
11 | 1, 3, 4, 5, 7, 10 | divmuldivapi 8556 | . . 3 ⊢ ((1 / 8) · (4 / 3)) = ((1 · 4) / (8 · 3)) |
12 | 1, 4 | mulcomi 7796 | . . . 4 ⊢ (1 · 4) = (4 · 1) |
13 | 2cn 8815 | . . . . . . . 8 ⊢ 2 ∈ ℂ | |
14 | 4, 13, 5 | mul32i 7933 | . . . . . . 7 ⊢ ((4 · 2) · 3) = ((4 · 3) · 2) |
15 | 4t2e8 8902 | . . . . . . . 8 ⊢ (4 · 2) = 8 | |
16 | 15 | oveq1i 5792 | . . . . . . 7 ⊢ ((4 · 2) · 3) = (8 · 3) |
17 | 14, 16 | eqtr3i 2163 | . . . . . 6 ⊢ ((4 · 3) · 2) = (8 · 3) |
18 | 4, 5, 13 | mulassi 7799 | . . . . . 6 ⊢ ((4 · 3) · 2) = (4 · (3 · 2)) |
19 | 17, 18 | eqtr3i 2163 | . . . . 5 ⊢ (8 · 3) = (4 · (3 · 2)) |
20 | 3t2e6 8900 | . . . . . 6 ⊢ (3 · 2) = 6 | |
21 | 20 | oveq2i 5793 | . . . . 5 ⊢ (4 · (3 · 2)) = (4 · 6) |
22 | 19, 21 | eqtri 2161 | . . . 4 ⊢ (8 · 3) = (4 · 6) |
23 | 12, 22 | oveq12i 5794 | . . 3 ⊢ ((1 · 4) / (8 · 3)) = ((4 · 1) / (4 · 6)) |
24 | 11, 23 | eqtri 2161 | . 2 ⊢ ((1 / 8) · (4 / 3)) = ((4 · 1) / (4 · 6)) |
25 | 6re 8825 | . . . 4 ⊢ 6 ∈ ℝ | |
26 | 25 | recni 7802 | . . 3 ⊢ 6 ∈ ℂ |
27 | 6pos 8845 | . . . 4 ⊢ 0 < 6 | |
28 | 25, 27 | gt0ap0ii 8414 | . . 3 ⊢ 6 # 0 |
29 | 4re 8821 | . . . 4 ⊢ 4 ∈ ℝ | |
30 | 4pos 8841 | . . . 4 ⊢ 0 < 4 | |
31 | 29, 30 | gt0ap0ii 8414 | . . 3 ⊢ 4 # 0 |
32 | divcanap5 8498 | . . . 4 ⊢ ((1 ∈ ℂ ∧ (6 ∈ ℂ ∧ 6 # 0) ∧ (4 ∈ ℂ ∧ 4 # 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) | |
33 | 1, 32 | mp3an1 1303 | . . 3 ⊢ (((6 ∈ ℂ ∧ 6 # 0) ∧ (4 ∈ ℂ ∧ 4 # 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) |
34 | 26, 28, 4, 31, 33 | mp4an 424 | . 2 ⊢ ((4 · 1) / (4 · 6)) = (1 / 6) |
35 | 24, 34 | eqtri 2161 | 1 ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 = wceq 1332 ∈ wcel 1481 class class class wbr 3937 (class class class)co 5782 ℂcc 7642 0cc0 7644 1c1 7645 · cmul 7649 # cap 8367 / cdiv 8456 2c2 8795 3c3 8796 4c4 8797 6c6 8799 8c8 8801 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 ax-cnex 7735 ax-resscn 7736 ax-1cn 7737 ax-1re 7738 ax-icn 7739 ax-addcl 7740 ax-addrcl 7741 ax-mulcl 7742 ax-mulrcl 7743 ax-addcom 7744 ax-mulcom 7745 ax-addass 7746 ax-mulass 7747 ax-distr 7748 ax-i2m1 7749 ax-0lt1 7750 ax-1rid 7751 ax-0id 7752 ax-rnegex 7753 ax-precex 7754 ax-cnre 7755 ax-pre-ltirr 7756 ax-pre-ltwlin 7757 ax-pre-lttrn 7758 ax-pre-apti 7759 ax-pre-ltadd 7760 ax-pre-mulgt0 7761 ax-pre-mulext 7762 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-nel 2405 df-ral 2422 df-rex 2423 df-reu 2424 df-rmo 2425 df-rab 2426 df-v 2691 df-sbc 2914 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-br 3938 df-opab 3998 df-id 4223 df-po 4226 df-iso 4227 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-iota 5096 df-fun 5133 df-fv 5139 df-riota 5738 df-ov 5785 df-oprab 5786 df-mpo 5787 df-pnf 7826 df-mnf 7827 df-xr 7828 df-ltxr 7829 df-le 7830 df-sub 7959 df-neg 7960 df-reap 8361 df-ap 8368 df-div 8457 df-2 8803 df-3 8804 df-4 8805 df-5 8806 df-6 8807 df-7 8808 df-8 8809 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |