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| Mirrors > Home > MPE Home > Th. List > affineequivne | Structured version Visualization version GIF version | ||
| Description: Equivalence between two ways of expressing 𝐴 as an affine combination of 𝐵 and 𝐶 if 𝐵 and 𝐶 are not equal. (Contributed by AV, 22-Jan-2023.) |
| Ref | Expression |
|---|---|
| affineequiv.a | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| affineequiv.b | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| affineequiv.c | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| affineequiv.d | ⊢ (𝜑 → 𝐷 ∈ ℂ) |
| affineequivne.d | ⊢ (𝜑 → 𝐵 ≠ 𝐶) |
| Ref | Expression |
|---|---|
| affineequivne | ⊢ (𝜑 → (𝐴 = (((1 − 𝐷) · 𝐵) + (𝐷 · 𝐶)) ↔ 𝐷 = ((𝐴 − 𝐵) / (𝐶 − 𝐵)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | affineequiv.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | affineequiv.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
| 3 | affineequiv.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 4 | affineequiv.d | . . 3 ⊢ (𝜑 → 𝐷 ∈ ℂ) | |
| 5 | 1, 2, 3, 4 | affineequiv3 26775 | . 2 ⊢ (𝜑 → (𝐴 = (((1 − 𝐷) · 𝐵) + (𝐷 · 𝐶)) ↔ (𝐴 − 𝐵) = (𝐷 · (𝐶 − 𝐵)))) |
| 6 | 1, 2 | subcld 11493 | . . . 4 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℂ) |
| 7 | 3, 2 | subcld 11493 | . . . 4 ⊢ (𝜑 → (𝐶 − 𝐵) ∈ ℂ) |
| 8 | affineequivne.d | . . . . . 6 ⊢ (𝜑 → 𝐵 ≠ 𝐶) | |
| 9 | 8 | necomd 2988 | . . . . 5 ⊢ (𝜑 → 𝐶 ≠ 𝐵) |
| 10 | 3, 2, 9 | subne0d 11502 | . . . 4 ⊢ (𝜑 → (𝐶 − 𝐵) ≠ 0) |
| 11 | 6, 4, 7, 10 | divmul3d 11952 | . . 3 ⊢ (𝜑 → (((𝐴 − 𝐵) / (𝐶 − 𝐵)) = 𝐷 ↔ (𝐴 − 𝐵) = (𝐷 · (𝐶 − 𝐵)))) |
| 12 | eqcom 2744 | . . 3 ⊢ (((𝐴 − 𝐵) / (𝐶 − 𝐵)) = 𝐷 ↔ 𝐷 = ((𝐴 − 𝐵) / (𝐶 − 𝐵))) | |
| 13 | 11, 12 | bitr3di 286 | . 2 ⊢ (𝜑 → ((𝐴 − 𝐵) = (𝐷 · (𝐶 − 𝐵)) ↔ 𝐷 = ((𝐴 − 𝐵) / (𝐶 − 𝐵)))) |
| 14 | 5, 13 | bitrd 279 | 1 ⊢ (𝜑 → (𝐴 = (((1 − 𝐷) · 𝐵) + (𝐷 · 𝐶)) ↔ 𝐷 = ((𝐴 − 𝐵) / (𝐶 − 𝐵)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7358 ℂcc 11025 1c1 11028 + caddc 11030 · cmul 11032 − cmin 11365 / cdiv 11795 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5368 ax-un 7680 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5517 df-po 5530 df-so 5531 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-er 8634 df-en 8885 df-dom 8886 df-sdom 8887 df-pnf 11169 df-mnf 11170 df-xr 11171 df-ltxr 11172 df-le 11173 df-sub 11367 df-neg 11368 df-div 11796 |
| This theorem is referenced by: affinecomb1 49136 |
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