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Mirrors > Home > MPE Home > Th. List > divmul13i | Structured version Visualization version GIF version |
Description: Swap denominators of two ratios. (Contributed by NM, 6-Aug-1999.) |
Ref | Expression |
---|---|
divclz.1 | ⊢ 𝐴 ∈ ℂ |
divclz.2 | ⊢ 𝐵 ∈ ℂ |
divmulz.3 | ⊢ 𝐶 ∈ ℂ |
divmuldiv.4 | ⊢ 𝐷 ∈ ℂ |
divmuldiv.5 | ⊢ 𝐵 ≠ 0 |
divmuldiv.6 | ⊢ 𝐷 ≠ 0 |
Ref | Expression |
---|---|
divmul13i | ⊢ ((𝐴 / 𝐵) · (𝐶 / 𝐷)) = ((𝐶 / 𝐵) · (𝐴 / 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | divmulz.3 | . . . 4 ⊢ 𝐶 ∈ ℂ | |
2 | divclz.1 | . . . 4 ⊢ 𝐴 ∈ ℂ | |
3 | 1, 2 | mulcomi 10841 | . . 3 ⊢ (𝐶 · 𝐴) = (𝐴 · 𝐶) |
4 | 3 | oveq1i 7223 | . 2 ⊢ ((𝐶 · 𝐴) / (𝐵 · 𝐷)) = ((𝐴 · 𝐶) / (𝐵 · 𝐷)) |
5 | divclz.2 | . . 3 ⊢ 𝐵 ∈ ℂ | |
6 | divmuldiv.4 | . . 3 ⊢ 𝐷 ∈ ℂ | |
7 | divmuldiv.5 | . . 3 ⊢ 𝐵 ≠ 0 | |
8 | divmuldiv.6 | . . 3 ⊢ 𝐷 ≠ 0 | |
9 | 1, 5, 2, 6, 7, 8 | divmuldivi 11592 | . 2 ⊢ ((𝐶 / 𝐵) · (𝐴 / 𝐷)) = ((𝐶 · 𝐴) / (𝐵 · 𝐷)) |
10 | 2, 5, 1, 6, 7, 8 | divmuldivi 11592 | . 2 ⊢ ((𝐴 / 𝐵) · (𝐶 / 𝐷)) = ((𝐴 · 𝐶) / (𝐵 · 𝐷)) |
11 | 4, 9, 10 | 3eqtr4ri 2776 | 1 ⊢ ((𝐴 / 𝐵) · (𝐶 / 𝐷)) = ((𝐶 / 𝐵) · (𝐴 / 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1543 ∈ wcel 2110 ≠ wne 2940 (class class class)co 7213 ℂcc 10727 0cc0 10729 · cmul 10734 / cdiv 11489 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-op 4548 df-uni 4820 df-br 5054 df-opab 5116 df-mpt 5136 df-id 5455 df-po 5468 df-so 5469 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-er 8391 df-en 8627 df-dom 8628 df-sdom 8629 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-div 11490 |
This theorem is referenced by: (None) |
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