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| Mirrors > Home > MPE Home > Th. List > affineequiv4 | Structured version Visualization version GIF version | ||
| Description: Equivalence between two ways of expressing 𝐴 as an affine combination of 𝐵 and 𝐶. (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) |
| Ref | Expression |
|---|---|
| affineequiv4 | ⊢ (𝜑 → (𝐴 = (((1 − 𝐷) · 𝐵) + (𝐷 · 𝐶)) ↔ 𝐴 = ((𝐷 · (𝐶 − 𝐵)) + 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 26856 | . 2 ⊢ (𝜑 → (𝐴 = (((1 − 𝐷) · 𝐵) + (𝐷 · 𝐶)) ↔ (𝐴 − 𝐵) = (𝐷 · (𝐶 − 𝐵)))) |
| 6 | 3, 2 | subcld 11528 | . . . . 5 ⊢ (𝜑 → (𝐶 − 𝐵) ∈ ℂ) |
| 7 | 4, 6 | mulcld 11188 | . . . 4 ⊢ (𝜑 → (𝐷 · (𝐶 − 𝐵)) ∈ ℂ) |
| 8 | 1, 2, 7 | subadd2d 11547 | . . 3 ⊢ (𝜑 → ((𝐴 − 𝐵) = (𝐷 · (𝐶 − 𝐵)) ↔ ((𝐷 · (𝐶 − 𝐵)) + 𝐵) = 𝐴)) |
| 9 | eqcom 2759 | . . 3 ⊢ (((𝐷 · (𝐶 − 𝐵)) + 𝐵) = 𝐴 ↔ 𝐴 = ((𝐷 · (𝐶 − 𝐵)) + 𝐵)) | |
| 10 | 8, 9 | bitrdi 289 | . 2 ⊢ (𝜑 → ((𝐴 − 𝐵) = (𝐷 · (𝐶 − 𝐵)) ↔ 𝐴 = ((𝐷 · (𝐶 − 𝐵)) + 𝐵))) |
| 11 | 5, 10 | bitrd 281 | 1 ⊢ (𝜑 → (𝐴 = (((1 − 𝐷) · 𝐵) + (𝐷 · 𝐶)) ↔ 𝐴 = ((𝐷 · (𝐶 − 𝐵)) + 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 = wceq 1550 ∈ wcel 2132 (class class class)co 7381 ℂcc 11057 1c1 11060 + caddc 11062 · cmul 11064 − cmin 11400 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-10 2165 ax-11 2181 ax-12 2202 ax-ext 2724 ax-sep 5236 ax-nul 5246 ax-pow 5312 ax-pr 5380 ax-un 7703 ax-resscn 11116 ax-1cn 11117 ax-icn 11118 ax-addcl 11119 ax-addrcl 11120 ax-mulcl 11121 ax-mulrcl 11122 ax-mulcom 11123 ax-addass 11124 ax-mulass 11125 ax-distr 11126 ax-i2m1 11127 ax-1ne0 11128 ax-1rid 11129 ax-rnegex 11130 ax-rrecex 11131 ax-cnre 11132 ax-pre-lttri 11133 ax-pre-lttrn 11134 ax-pre-ltadd 11135 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3or 1096 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-nf 1794 df-sb 2081 df-mo 2556 df-eu 2586 df-clab 2731 df-cleq 2744 df-clel 2827 df-nfc 2901 df-ne 2948 df-nel 3052 df-ral 3067 df-rex 3077 df-reu 3358 df-rab 3405 df-v 3446 df-sbc 3736 df-csb 3844 df-dif 3898 df-un 3900 df-in 3902 df-ss 3912 df-nul 4277 df-if 4471 df-pw 4547 df-sn 4573 df-pr 4575 df-op 4579 df-uni 4856 df-br 5091 df-opab 5153 df-mpt 5172 df-id 5531 df-po 5544 df-so 5545 df-xp 5642 df-rel 5643 df-cnv 5644 df-co 5645 df-dm 5646 df-rn 5647 df-res 5648 df-ima 5649 df-iota 6462 df-fun 6508 df-fn 6509 df-f 6510 df-f1 6511 df-fo 6512 df-f1o 6513 df-fv 6514 df-riota 7338 df-ov 7384 df-oprab 7385 df-mpo 7386 df-er 8662 df-en 8913 df-dom 8914 df-sdom 8915 df-pnf 11204 df-mnf 11205 df-ltxr 11207 df-sub 11402 df-neg 11403 |
| This theorem is referenced by: affinecomb1 49262 |
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