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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 7199 | . . 3 ⊢ (𝑥 = 𝑋 → (𝑍𝐿𝑥) = (𝑍𝐿𝑋)) | |
2 | 1 | breq1d 5049 | . 2 ⊢ (𝑥 = 𝑋 → ((𝑍𝐿𝑥)(⟂G‘𝐺)𝐴 ↔ (𝑍𝐿𝑋)(⟂G‘𝐺)𝐴)) |
3 | oveq2 7199 | . . 3 ⊢ (𝑥 = 𝑌 → (𝑍𝐿𝑥) = (𝑍𝐿𝑌)) | |
4 | 3 | breq1d 5049 | . 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 26768 | . . 3 ⊢ (𝜑 → ¬ 𝑍 ∈ 𝐴) |
15 | 5, 6, 7, 8, 9, 10, 11, 14 | foot 26767 | . 2 ⊢ (𝜑 → ∃!𝑥 ∈ 𝐴 (𝑍𝐿𝑥)(⟂G‘𝐺)𝐴) |
16 | footeq.y | . 2 ⊢ (𝜑 → 𝑌 ∈ 𝐴) | |
17 | 5, 8, 7, 9, 10, 12 | tglnpt 26594 | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑃) |
18 | 8, 9, 13 | perpln1 26755 | . . . . 5 ⊢ (𝜑 → (𝑋𝐿𝑍) ∈ ran 𝐿) |
19 | 5, 7, 8, 9, 17, 11, 18 | tglnne 26673 | . . . 4 ⊢ (𝜑 → 𝑋 ≠ 𝑍) |
20 | 5, 7, 8, 9, 17, 11, 19 | tglinecom 26680 | . . 3 ⊢ (𝜑 → (𝑋𝐿𝑍) = (𝑍𝐿𝑋)) |
21 | 20, 13 | eqbrtrrd 5063 | . 2 ⊢ (𝜑 → (𝑍𝐿𝑋)(⟂G‘𝐺)𝐴) |
22 | 5, 8, 7, 9, 10, 16 | tglnpt 26594 | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝑃) |
23 | footeq.2 | . . . . . 6 ⊢ (𝜑 → (𝑌𝐿𝑍)(⟂G‘𝐺)𝐴) | |
24 | 8, 9, 23 | perpln1 26755 | . . . . 5 ⊢ (𝜑 → (𝑌𝐿𝑍) ∈ ran 𝐿) |
25 | 5, 7, 8, 9, 22, 11, 24 | tglnne 26673 | . . . 4 ⊢ (𝜑 → 𝑌 ≠ 𝑍) |
26 | 5, 7, 8, 9, 22, 11, 25 | tglinecom 26680 | . . 3 ⊢ (𝜑 → (𝑌𝐿𝑍) = (𝑍𝐿𝑌)) |
27 | 26, 23 | eqbrtrrd 5063 | . 2 ⊢ (𝜑 → (𝑍𝐿𝑌)(⟂G‘𝐺)𝐴) |
28 | 2, 4, 15, 12, 16, 21, 27 | reu2eqd 3638 | 1 ⊢ (𝜑 → 𝑋 = 𝑌) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1543 ∈ wcel 2112 class class class wbr 5039 ran crn 5537 ‘cfv 6358 (class class class)co 7191 Basecbs 16666 distcds 16758 TarskiGcstrkg 26475 Itvcitv 26481 LineGclng 26482 ⟂Gcperpg 26740 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-rep 5164 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-cnex 10750 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-int 4846 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-om 7623 df-1st 7739 df-2nd 7740 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-1o 8180 df-oadd 8184 df-er 8369 df-map 8488 df-pm 8489 df-en 8605 df-dom 8606 df-sdom 8607 df-fin 8608 df-dju 9482 df-card 9520 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-nn 11796 df-2 11858 df-3 11859 df-n0 12056 df-xnn0 12128 df-z 12142 df-uz 12404 df-fz 13061 df-fzo 13204 df-hash 13862 df-word 14035 df-concat 14091 df-s1 14118 df-s2 14378 df-s3 14379 df-trkgc 26493 df-trkgb 26494 df-trkgcb 26495 df-trkg 26498 df-cgrg 26556 df-leg 26628 df-mir 26698 df-rag 26739 df-perpg 26741 |
This theorem is referenced by: (None) |
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