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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 3934 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 5 | constrrtlc2.1 | . . . . . . 7 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 6 | 5 | eqcomd 2742 | . . . . . 6 ⊢ (𝜑 → 𝐵 = 𝐴) |
| 7 | 4, 6 | subeq0bd 11565 | . . . . 5 ⊢ (𝜑 → (𝐵 − 𝐴) = 0) |
| 8 | 7 | oveq2d 7374 | . . . 4 ⊢ (𝜑 → (𝑇 · (𝐵 − 𝐴)) = (𝑇 · 0)) |
| 9 | constrrtlc.t | . . . . . 6 ⊢ (𝜑 → 𝑇 ∈ ℝ) | |
| 10 | 9 | recnd 11162 | . . . . 5 ⊢ (𝜑 → 𝑇 ∈ ℂ) |
| 11 | 10 | mul01d 11334 | . . . 4 ⊢ (𝜑 → (𝑇 · 0) = 0) |
| 12 | 8, 11 | eqtrd 2771 | . . 3 ⊢ (𝜑 → (𝑇 · (𝐵 − 𝐴)) = 0) |
| 13 | 12 | oveq2d 7374 | . 2 ⊢ (𝜑 → (𝐴 + (𝑇 · (𝐵 − 𝐴))) = (𝐴 + 0)) |
| 14 | constrrtlc.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑆) | |
| 15 | 2, 14 | sseldd 3934 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 16 | 15 | addridd 11335 | . 2 ⊢ (𝜑 → (𝐴 + 0) = 𝐴) |
| 17 | 1, 13, 16 | 3eqtrd 2775 | 1 ⊢ (𝜑 → 𝑋 = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ⊆ wss 3901 ‘cfv 6492 (class class class)co 7358 ℂcc 11026 ℝcr 11027 0cc0 11028 + caddc 11031 · cmul 11033 − cmin 11366 abscabs 15159 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-mpt 5180 df-id 5519 df-po 5532 df-so 5533 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-er 8635 df-en 8886 df-dom 8887 df-sdom 8888 df-pnf 11170 df-mnf 11171 df-ltxr 11173 df-sub 11368 |
| This theorem is referenced by: constrfin 33905 constrelextdg2 33906 |
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