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Theorem tglineelsb2 28722

Description: If 𝑆 lies on PQ , then PQ = PS . Theorem 6.16 of [Schwabhauser] p. 45. (Contributed by Thierry Arnoux, 17-May-2019.)

**Hypotheses**
Ref	Expression
tglineelsb2.p	⊢ 𝐵 = (Base‘𝐺)
tglineelsb2.i	⊢ 𝐼 = (Itv‘𝐺)
tglineelsb2.l	⊢ 𝐿 = (LineG‘𝐺)
tglineelsb2.g	⊢ (𝜑 → 𝐺 ∈ TarskiG)
tglineelsb2.1	⊢ (𝜑 → 𝑃 ∈ 𝐵)
tglineelsb2.2	⊢ (𝜑 → 𝑄 ∈ 𝐵)
tglineelsb2.4	⊢ (𝜑 → 𝑃 ≠ 𝑄)
tglineelsb2.3	⊢ (𝜑 → 𝑆 ∈ 𝐵)
tglineelsb2.5	⊢ (𝜑 → 𝑆 ≠ 𝑃)
tglineelsb2.6	⊢ (𝜑 → 𝑆 ∈ (𝑃𝐿𝑄))

**Assertion**
Ref	Expression
tglineelsb2	⊢ (𝜑 → (𝑃𝐿𝑄) = (𝑃𝐿𝑆))

Proof of Theorem tglineelsb2 Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		tglineelsb2.p	. . . 4 ⊢ 𝐵 = (Base‘𝐺)
2		tglineelsb2.i	. . . 4 ⊢ 𝐼 = (Itv‘𝐺)
3		tglineelsb2.l	. . . 4 ⊢ 𝐿 = (LineG‘𝐺)
4		tglineelsb2.g	. . . . 5 ⊢ (𝜑 → 𝐺 ∈ TarskiG)
5	4	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝐺 ∈ TarskiG)
6		tglineelsb2.1	. . . . 5 ⊢ (𝜑 → 𝑃 ∈ 𝐵)
7	6	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑃 ∈ 𝐵)
8		tglineelsb2.3	. . . . 5 ⊢ (𝜑 → 𝑆 ∈ 𝐵)
9	8	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑆 ∈ 𝐵)
10		tglineelsb2.5	. . . . . 6 ⊢ (𝜑 → 𝑆 ≠ 𝑃)
11	10	necomd 2988	. . . . 5 ⊢ (𝜑 → 𝑃 ≠ 𝑆)
12	11	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑃 ≠ 𝑆)
13		tglineelsb2.2	. . . . 5 ⊢ (𝜑 → 𝑄 ∈ 𝐵)
14	13	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑄 ∈ 𝐵)
15		tglineelsb2.4	. . . . . 6 ⊢ (𝜑 → 𝑃 ≠ 𝑄)
16	15	necomd 2988	. . . . 5 ⊢ (𝜑 → 𝑄 ≠ 𝑃)
17	16	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑄 ≠ 𝑃)
18		tglineelsb2.6	. . . . . . 7 ⊢ (𝜑 → 𝑆 ∈ (𝑃𝐿𝑄))
19	18	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑆 ∈ (𝑃𝐿𝑄))
20	1, 2, 3, 5, 14, 7, 9, 17, 19	lncom 28712	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑆 ∈ (𝑄𝐿𝑃))
21	1, 2, 3, 5, 7, 9, 14, 12, 20, 17	lnrot1 28713	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑄 ∈ (𝑃𝐿𝑆))
22	1, 3, 2, 4, 6, 13, 15	tglnssp 28642	. . . . 5 ⊢ (𝜑 → (𝑃𝐿𝑄) ⊆ 𝐵)
23	22	sselda 3935	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑥 ∈ 𝐵)
24		simpr 484	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑥 ∈ (𝑃𝐿𝑄))
25	1, 2, 3, 5, 7, 9, 12, 14, 17, 21, 23, 24	tglineeltr 28721	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑄)) → 𝑥 ∈ (𝑃𝐿𝑆))
26	4	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝐺 ∈ TarskiG)
27	6	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑃 ∈ 𝐵)
28	13	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑄 ∈ 𝐵)
29	15	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑃 ≠ 𝑄)
30	8	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑆 ∈ 𝐵)
31	10	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑆 ≠ 𝑃)
32	18	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑆 ∈ (𝑃𝐿𝑄))
33	1, 3, 2, 4, 6, 8, 11	tglnssp 28642	. . . . 5 ⊢ (𝜑 → (𝑃𝐿𝑆) ⊆ 𝐵)
34	33	sselda 3935	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑥 ∈ 𝐵)
35		simpr 484	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑥 ∈ (𝑃𝐿𝑆))
36	1, 2, 3, 26, 27, 28, 29, 30, 31, 32, 34, 35	tglineeltr 28721	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃𝐿𝑆)) → 𝑥 ∈ (𝑃𝐿𝑄))
37	25, 36	impbida 801	. 2 ⊢ (𝜑 → (𝑥 ∈ (𝑃𝐿𝑄) ↔ 𝑥 ∈ (𝑃𝐿𝑆)))
38	37	eqrdv 2735	1 ⊢ (𝜑 → (𝑃𝐿𝑄) = (𝑃𝐿𝑆))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ‘cfv 6502 (class class class)co 7370 Basecbs 17150 TarskiGcstrkg 28516 Itvcitv 28522 LineGclng 28523

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 ax-cnex 11096 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 ax-pre-mulgt0 11117

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5529 df-eprel 5534 df-po 5542 df-so 5543 df-fr 5587 df-we 5589 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6269 df-ord 6330 df-on 6331 df-lim 6332 df-suc 6333 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-om 7821 df-1st 7945 df-2nd 7946 df-frecs 8235 df-wrecs 8266 df-recs 8315 df-rdg 8353 df-1o 8409 df-oadd 8413 df-er 8647 df-pm 8780 df-en 8898 df-dom 8899 df-sdom 8900 df-fin 8901 df-dju 9827 df-card 9865 df-pnf 11182 df-mnf 11183 df-xr 11184 df-ltxr 11185 df-le 11186 df-sub 11380 df-neg 11381 df-nn 12160 df-2 12222 df-3 12223 df-n0 12416 df-xnn0 12489 df-z 12503 df-uz 12766 df-fz 13438 df-fzo 13585 df-hash 14268 df-word 14451 df-concat 14508 df-s1 14534 df-s2 14785 df-s3 14786 df-trkgc 28537 df-trkgb 28538 df-trkgcb 28539 df-trkg 28542 df-cgrg 28601

This theorem is referenced by: tglinethru 28726 ncolncol 28736 coltr3 28738 hlperpnel 28815 colperpexlem3 28822 mideulem2 28824 lmieu 28874 lmiisolem 28886

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