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| Mirrors > Home > MPE Home > Th. List > Mathboxes > constrrtlc2 | Structured version Visualization version GIF version | ||
| Description: In the construction of constructible numbers, line-circle intersections are one of the original points, in a degenerate case. (Contributed by Thierry Arnoux, 6-Jul-2025.) |
| Ref | Expression |
|---|---|
| constrrtlc.s | ⊢ (𝜑 → 𝑆 ⊆ ℂ) |
| constrrtlc.a | ⊢ (𝜑 → 𝐴 ∈ 𝑆) |
| constrrtlc.b | ⊢ (𝜑 → 𝐵 ∈ 𝑆) |
| constrrtlc.c | ⊢ (𝜑 → 𝐶 ∈ 𝑆) |
| constrrtlc.e | ⊢ (𝜑 → 𝐸 ∈ 𝑆) |
| constrrtlc.f | ⊢ (𝜑 → 𝐹 ∈ 𝑆) |
| constrrtlc.t | ⊢ (𝜑 → 𝑇 ∈ ℝ) |
| constrrtlc.1 | ⊢ (𝜑 → 𝑋 = (𝐴 + (𝑇 · (𝐵 − 𝐴)))) |
| constrrtlc.2 | ⊢ (𝜑 → (abs‘(𝑋 − 𝐶)) = (abs‘(𝐸 − 𝐹))) |
| constrrtlc2.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| constrrtlc2 | ⊢ (𝜑 → 𝑋 = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | constrrtlc.1 | . 2 ⊢ (𝜑 → 𝑋 = (𝐴 + (𝑇 · (𝐵 − 𝐴)))) | |
| 2 | constrrtlc.s | . . . . . . 7 ⊢ (𝜑 → 𝑆 ⊆ ℂ) | |
| 3 | constrrtlc.b | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ 𝑆) | |
| 4 | 2, 3 | sseldd 3938 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 5 | constrrtlc2.1 | . . . . . . 7 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 6 | 5 | eqcomd 2769 | . . . . . 6 ⊢ (𝜑 → 𝐵 = 𝐴) |
| 7 | 4, 6 | subeq0bd 11614 | . . . . 5 ⊢ (𝜑 → (𝐵 − 𝐴) = 0) |
| 8 | 7 | oveq2d 7413 | . . . 4 ⊢ (𝜑 → (𝑇 · (𝐵 − 𝐴)) = (𝑇 · 0)) |
| 9 | constrrtlc.t | . . . . . 6 ⊢ (𝜑 → 𝑇 ∈ ℝ) | |
| 10 | 9 | recnd 11211 | . . . . 5 ⊢ (𝜑 → 𝑇 ∈ ℂ) |
| 11 | 10 | mul01d 11383 | . . . 4 ⊢ (𝜑 → (𝑇 · 0) = 0) |
| 12 | 8, 11 | eqtrd 2798 | . . 3 ⊢ (𝜑 → (𝑇 · (𝐵 − 𝐴)) = 0) |
| 13 | 12 | oveq2d 7413 | . 2 ⊢ (𝜑 → (𝐴 + (𝑇 · (𝐵 − 𝐴))) = (𝐴 + 0)) |
| 14 | constrrtlc.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑆) | |
| 15 | 2, 14 | sseldd 3938 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 16 | 15 | addridd 11384 | . 2 ⊢ (𝜑 → (𝐴 + 0) = 𝐴) |
| 17 | 1, 13, 16 | 3eqtrd 2802 | 1 ⊢ (𝜑 → 𝑋 = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1561 ∈ wcel 2143 ⊆ wss 3905 ‘cfv 6522 (class class class)co 7397 ℂcc 11072 ℝcr 11073 0cc0 11074 + caddc 11077 · cmul 11079 − cmin 11415 abscabs 15262 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7719 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5102 df-opab 5164 df-mpt 5183 df-id 5543 df-po 5556 df-so 5557 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-iota 6478 df-fun 6524 df-fn 6525 df-f 6526 df-f1 6527 df-fo 6528 df-f1o 6529 df-fv 6530 df-riota 7354 df-ov 7400 df-oprab 7401 df-mpo 7402 df-er 8679 df-en 8929 df-dom 8930 df-sdom 8931 df-pnf 11219 df-mnf 11220 df-ltxr 11222 df-sub 11417 |
| This theorem is referenced by: constrfin 34044 constrelextdg2 34045 |
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