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Theorem hlcgreu 27869

Description: The point constructed in hlcgrex 27867 is unique. Theorem 6.11 of [Schwabhauser] p. 44. (Contributed by Thierry Arnoux, 9-Aug-2020.)

**Hypotheses**
Ref	Expression
ishlg.p	⊢ 𝑃 = (Base‘𝐺)
ishlg.i	⊢ 𝐼 = (Itv‘𝐺)
ishlg.k	⊢ 𝐾 = (hlG‘𝐺)
ishlg.a	⊢ (𝜑 → 𝐴 ∈ 𝑃)
ishlg.b	⊢ (𝜑 → 𝐵 ∈ 𝑃)
ishlg.c	⊢ (𝜑 → 𝐶 ∈ 𝑃)
hlln.1	⊢ (𝜑 → 𝐺 ∈ TarskiG)
hltr.d	⊢ (𝜑 → 𝐷 ∈ 𝑃)
hlcgrex.m	⊢ − = (dist‘𝐺)
hlcgrex.1	⊢ (𝜑 → 𝐷 ≠ 𝐴)
hlcgrex.2	⊢ (𝜑 → 𝐵 ≠ 𝐶)

**Assertion**
Ref	Expression
hlcgreu	⊢ (𝜑 → ∃!𝑥 ∈ 𝑃 (𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)))

Distinct variable groups: 𝑥, − 𝑥,𝐴 𝑥,𝐵 𝑥,𝐶 𝑥,𝐷 𝑥,𝐾 𝑥,𝐼 𝑥,𝑃 𝜑,𝑥 Allowed substitution hint: 𝐺(𝑥)

Proof of Theorem hlcgreu Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ishlg.p	. . 3 ⊢ 𝑃 = (Base‘𝐺)
2		ishlg.i	. . 3 ⊢ 𝐼 = (Itv‘𝐺)
3		ishlg.k	. . 3 ⊢ 𝐾 = (hlG‘𝐺)
4		ishlg.a	. . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑃)
5		ishlg.b	. . 3 ⊢ (𝜑 → 𝐵 ∈ 𝑃)
6		ishlg.c	. . 3 ⊢ (𝜑 → 𝐶 ∈ 𝑃)
7		hlln.1	. . 3 ⊢ (𝜑 → 𝐺 ∈ TarskiG)
8		hltr.d	. . 3 ⊢ (𝜑 → 𝐷 ∈ 𝑃)
9		hlcgrex.m	. . 3 ⊢ − = (dist‘𝐺)
10		hlcgrex.1	. . 3 ⊢ (𝜑 → 𝐷 ≠ 𝐴)
11		hlcgrex.2	. . 3 ⊢ (𝜑 → 𝐵 ≠ 𝐶)
12	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11	hlcgrex 27867	. 2 ⊢ (𝜑 → ∃𝑥 ∈ 𝑃 (𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)))
13	4	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝐴 ∈ 𝑃)
14	5	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝐵 ∈ 𝑃)
15	6	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝐶 ∈ 𝑃)
16	7	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝐺 ∈ TarskiG)
17	8	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝐷 ∈ 𝑃)
18	10	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝐷 ≠ 𝐴)
19	11	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝐵 ≠ 𝐶)
20		simpllr 775	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝑥 ∈ 𝑃)
21		simplr 768	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝑦 ∈ 𝑃)
22		simprll 778	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝑥(𝐾‘𝐴)𝐷)
23		simprrl 780	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝑦(𝐾‘𝐴)𝐷)
24		simprlr 779	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → (𝐴 − 𝑥) = (𝐵 − 𝐶))
25		simprrr 781	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → (𝐴 − 𝑦) = (𝐵 − 𝐶))
26	1, 2, 3, 13, 14, 15, 16, 17, 9, 18, 19, 20, 21, 22, 23, 24, 25	hlcgreulem 27868	. . . . 5 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) ∧ ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶)))) → 𝑥 = 𝑦)
27	26	ex 414	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ 𝑦 ∈ 𝑃) → (((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶))) → 𝑥 = 𝑦))
28	27	ralrimiva 3147	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑃) → ∀𝑦 ∈ 𝑃 (((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶))) → 𝑥 = 𝑦))
29	28	ralrimiva 3147	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝑃 ∀𝑦 ∈ 𝑃 (((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶))) → 𝑥 = 𝑦))
30		breq1 5152	. . . 4 ⊢ (𝑥 = 𝑦 → (𝑥(𝐾‘𝐴)𝐷 ↔ 𝑦(𝐾‘𝐴)𝐷))
31		oveq2 7417	. . . . 5 ⊢ (𝑥 = 𝑦 → (𝐴 − 𝑥) = (𝐴 − 𝑦))
32	31	eqeq1d 2735	. . . 4 ⊢ (𝑥 = 𝑦 → ((𝐴 − 𝑥) = (𝐵 − 𝐶) ↔ (𝐴 − 𝑦) = (𝐵 − 𝐶)))
33	30, 32	anbi12d 632	. . 3 ⊢ (𝑥 = 𝑦 → ((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ↔ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶))))
34	33	reu4 3728	. 2 ⊢ (∃!𝑥 ∈ 𝑃 (𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ↔ (∃𝑥 ∈ 𝑃 (𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ ∀𝑥 ∈ 𝑃 ∀𝑦 ∈ 𝑃 (((𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)) ∧ (𝑦(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑦) = (𝐵 − 𝐶))) → 𝑥 = 𝑦)))
35	12, 29, 34	sylanbrc 584	1 ⊢ (𝜑 → ∃!𝑥 ∈ 𝑃 (𝑥(𝐾‘𝐴)𝐷 ∧ (𝐴 − 𝑥) = (𝐵 − 𝐶)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 ∃wrex 3071 ∃!wreu 3375 class class class wbr 5149 ‘cfv 6544 (class class class)co 7409 Basecbs 17144 distcds 17206 TarskiGcstrkg 27678 Itvcitv 27684 hlGchlg 27851

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-oadd 8470 df-er 8703 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-dju 9896 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-xnn0 12545 df-z 12559 df-uz 12823 df-fz 13485 df-fzo 13628 df-hash 14291 df-word 14465 df-concat 14521 df-s1 14546 df-s2 14799 df-s3 14800 df-trkgc 27699 df-trkgb 27700 df-trkgcb 27701 df-trkg 27704 df-cgrg 27762 df-hlg 27852

This theorem is referenced by: (None)

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