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Mirrors > Home > MPE Home > Th. List > footeq | Structured version Visualization version GIF version |
Description: Uniqueness of the foot point. (Contributed by Thierry Arnoux, 1-Mar-2020.) |
Ref | Expression |
---|---|
isperp.p | ⊢ 𝑃 = (Base‘𝐺) |
isperp.d | ⊢ − = (dist‘𝐺) |
isperp.i | ⊢ 𝐼 = (Itv‘𝐺) |
isperp.l | ⊢ 𝐿 = (LineG‘𝐺) |
isperp.g | ⊢ (𝜑 → 𝐺 ∈ TarskiG) |
isperp.a | ⊢ (𝜑 → 𝐴 ∈ ran 𝐿) |
footeq.x | ⊢ (𝜑 → 𝑋 ∈ 𝐴) |
footeq.y | ⊢ (𝜑 → 𝑌 ∈ 𝐴) |
footeq.z | ⊢ (𝜑 → 𝑍 ∈ 𝑃) |
footeq.1 | ⊢ (𝜑 → (𝑋𝐿𝑍)(⟂G‘𝐺)𝐴) |
footeq.2 | ⊢ (𝜑 → (𝑌𝐿𝑍)(⟂G‘𝐺)𝐴) |
Ref | Expression |
---|---|
footeq | ⊢ (𝜑 → 𝑋 = 𝑌) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq2 7263 | . . 3 ⊢ (𝑥 = 𝑋 → (𝑍𝐿𝑥) = (𝑍𝐿𝑋)) | |
2 | 1 | breq1d 5080 | . 2 ⊢ (𝑥 = 𝑋 → ((𝑍𝐿𝑥)(⟂G‘𝐺)𝐴 ↔ (𝑍𝐿𝑋)(⟂G‘𝐺)𝐴)) |
3 | oveq2 7263 | . . 3 ⊢ (𝑥 = 𝑌 → (𝑍𝐿𝑥) = (𝑍𝐿𝑌)) | |
4 | 3 | breq1d 5080 | . 2 ⊢ (𝑥 = 𝑌 → ((𝑍𝐿𝑥)(⟂G‘𝐺)𝐴 ↔ (𝑍𝐿𝑌)(⟂G‘𝐺)𝐴)) |
5 | isperp.p | . . 3 ⊢ 𝑃 = (Base‘𝐺) | |
6 | isperp.d | . . 3 ⊢ − = (dist‘𝐺) | |
7 | isperp.i | . . 3 ⊢ 𝐼 = (Itv‘𝐺) | |
8 | isperp.l | . . 3 ⊢ 𝐿 = (LineG‘𝐺) | |
9 | isperp.g | . . 3 ⊢ (𝜑 → 𝐺 ∈ TarskiG) | |
10 | isperp.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ran 𝐿) | |
11 | footeq.z | . . 3 ⊢ (𝜑 → 𝑍 ∈ 𝑃) | |
12 | footeq.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐴) | |
13 | footeq.1 | . . . 4 ⊢ (𝜑 → (𝑋𝐿𝑍)(⟂G‘𝐺)𝐴) | |
14 | 5, 6, 7, 8, 9, 10, 12, 11, 13 | footne 26988 | . . 3 ⊢ (𝜑 → ¬ 𝑍 ∈ 𝐴) |
15 | 5, 6, 7, 8, 9, 10, 11, 14 | foot 26987 | . 2 ⊢ (𝜑 → ∃!𝑥 ∈ 𝐴 (𝑍𝐿𝑥)(⟂G‘𝐺)𝐴) |
16 | footeq.y | . 2 ⊢ (𝜑 → 𝑌 ∈ 𝐴) | |
17 | 5, 8, 7, 9, 10, 12 | tglnpt 26814 | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑃) |
18 | 8, 9, 13 | perpln1 26975 | . . . . 5 ⊢ (𝜑 → (𝑋𝐿𝑍) ∈ ran 𝐿) |
19 | 5, 7, 8, 9, 17, 11, 18 | tglnne 26893 | . . . 4 ⊢ (𝜑 → 𝑋 ≠ 𝑍) |
20 | 5, 7, 8, 9, 17, 11, 19 | tglinecom 26900 | . . 3 ⊢ (𝜑 → (𝑋𝐿𝑍) = (𝑍𝐿𝑋)) |
21 | 20, 13 | eqbrtrrd 5094 | . 2 ⊢ (𝜑 → (𝑍𝐿𝑋)(⟂G‘𝐺)𝐴) |
22 | 5, 8, 7, 9, 10, 16 | tglnpt 26814 | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝑃) |
23 | footeq.2 | . . . . . 6 ⊢ (𝜑 → (𝑌𝐿𝑍)(⟂G‘𝐺)𝐴) | |
24 | 8, 9, 23 | perpln1 26975 | . . . . 5 ⊢ (𝜑 → (𝑌𝐿𝑍) ∈ ran 𝐿) |
25 | 5, 7, 8, 9, 22, 11, 24 | tglnne 26893 | . . . 4 ⊢ (𝜑 → 𝑌 ≠ 𝑍) |
26 | 5, 7, 8, 9, 22, 11, 25 | tglinecom 26900 | . . 3 ⊢ (𝜑 → (𝑌𝐿𝑍) = (𝑍𝐿𝑌)) |
27 | 26, 23 | eqbrtrrd 5094 | . 2 ⊢ (𝜑 → (𝑍𝐿𝑌)(⟂G‘𝐺)𝐴) |
28 | 2, 4, 15, 12, 16, 21, 27 | reu2eqd 3666 | 1 ⊢ (𝜑 → 𝑋 = 𝑌) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2108 class class class wbr 5070 ran crn 5581 ‘cfv 6418 (class class class)co 7255 Basecbs 16840 distcds 16897 TarskiGcstrkg 26693 Itvcitv 26699 LineGclng 26700 ⟂Gcperpg 26960 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-oadd 8271 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-dju 9590 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-xnn0 12236 df-z 12250 df-uz 12512 df-fz 13169 df-fzo 13312 df-hash 13973 df-word 14146 df-concat 14202 df-s1 14229 df-s2 14489 df-s3 14490 df-trkgc 26713 df-trkgb 26714 df-trkgcb 26715 df-trkg 26718 df-cgrg 26776 df-leg 26848 df-mir 26918 df-rag 26959 df-perpg 26961 |
This theorem is referenced by: (None) |
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