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| Mirrors > Home > MPE Home > Th. List > Mathboxes > tgextamirn | Structured version Visualization version GIF version | ||
| Description: The midpoint-reflected point is off line 𝐴𝐶. If it were on that line, mirln 29148-- whose centre-on-the-line hypothesis is the midpoint, itself on 𝐴𝐶-- would put its reflection there too, and mirmir 29134 says that reflection is 𝐵, contradicting the triangle's non-collinearity. This is the strengthening inA cannot give: it is what turns "inside the angle" into an open half-plane fact. (Contributed by JAG, 12-Aug-2026.) |
| Ref | Expression |
|---|---|
| tgmircgrg.p | ⊢ 𝑃 = (Base‘𝐺) |
| tgmircgrg.m | ⊢ − = (dist‘𝐺) |
| tgmircgrg.i | ⊢ 𝐼 = (Itv‘𝐺) |
| tgmircgrg.l | ⊢ 𝐿 = (LineG‘𝐺) |
| tgmircgrg.g | ⊢ (𝜑 → 𝐺 ∈ TarskiG) |
| tgmircgrg.a | ⊢ (𝜑 → 𝐴 ∈ 𝑃) |
| tgmircgrg.b | ⊢ (𝜑 → 𝐵 ∈ 𝑃) |
| tgmircgrg.c | ⊢ (𝜑 → 𝐶 ∈ 𝑃) |
| tgmircgrg.ncol | ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐵𝐿𝐶) ∨ 𝐵 = 𝐶)) |
| Ref | Expression |
|---|---|
| tgextamirn | ⊢ (𝜑 → ¬ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tgmircgrg.p | . . . . 5 ⊢ 𝑃 = (Base‘𝐺) | |
| 2 | tgmircgrg.l | . . . . 5 ⊢ 𝐿 = (LineG‘𝐺) | |
| 3 | tgmircgrg.i | . . . . 5 ⊢ 𝐼 = (Itv‘𝐺) | |
| 4 | tgmircgrg.g | . . . . 5 ⊢ (𝜑 → 𝐺 ∈ TarskiG) | |
| 5 | tgmircgrg.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ 𝑃) | |
| 6 | tgmircgrg.a | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑃) | |
| 7 | tgmircgrg.b | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ 𝑃) | |
| 8 | tgmircgrg.ncol | . . . . . 6 ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐵𝐿𝐶) ∨ 𝐵 = 𝐶)) | |
| 9 | 1, 2, 3, 4, 7, 5, 6, 8 | ncolrot1 29025 | . . . . 5 ⊢ (𝜑 → ¬ (𝐵 ∈ (𝐶𝐿𝐴) ∨ 𝐶 = 𝐴)) |
| 10 | 1, 2, 3, 4, 5, 6, 7, 9 | ncolcom 29024 | . . . 4 ⊢ (𝜑 → ¬ (𝐵 ∈ (𝐴𝐿𝐶) ∨ 𝐴 = 𝐶)) |
| 11 | ioran 999 | . . . 4 ⊢ (¬ (𝐵 ∈ (𝐴𝐿𝐶) ∨ 𝐴 = 𝐶) ↔ (¬ 𝐵 ∈ (𝐴𝐿𝐶) ∧ ¬ 𝐴 = 𝐶)) | |
| 12 | 10, 11 | sylib 221 | . . 3 ⊢ (𝜑 → (¬ 𝐵 ∈ (𝐴𝐿𝐶) ∧ ¬ 𝐴 = 𝐶)) |
| 13 | 12 | simpld 500 | . 2 ⊢ (𝜑 → ¬ 𝐵 ∈ (𝐴𝐿𝐶)) |
| 14 | tgmircgrg.m | . . . 4 ⊢ − = (dist‘𝐺) | |
| 15 | eqid 2760 | . . . 4 ⊢ (pInvG‘𝐺) = (pInvG‘𝐺) | |
| 16 | 4 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → 𝐺 ∈ TarskiG) |
| 17 | 1, 2, 3, 4, 7, 5, 6, 8 | ncoltgdim2 29028 | . . . . . 6 ⊢ (𝜑 → 𝐺DimTarskiG≥2) |
| 18 | 1, 14, 3, 4, 17, 6, 5 | midcl 29282 | . . . . 5 ⊢ (𝜑 → (𝐴(midG‘𝐺)𝐶) ∈ 𝑃) |
| 19 | 18 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → (𝐴(midG‘𝐺)𝐶) ∈ 𝑃) |
| 20 | eqid 2760 | . . . 4 ⊢ ((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶)) = ((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶)) | |
| 21 | 7 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → 𝐵 ∈ 𝑃) |
| 22 | 1, 14, 3, 2, 15, 16, 19, 20, 21 | mirmir 29134 | . . 3 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘(((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵)) = 𝐵) |
| 23 | eqid 2760 | . . . 4 ⊢ (pInvG‘𝐺) = (pInvG‘𝐺) | |
| 24 | 4 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → 𝐺 ∈ TarskiG) |
| 25 | eqid 2760 | . . . 4 ⊢ ((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶)) = ((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶)) | |
| 26 | 1, 3, 2, 4, 6, 7, 5, 8 | ncolne2 29094 | . . . . . 6 ⊢ (𝜑 → 𝐴 ≠ 𝐶) |
| 27 | 1, 3, 2, 4, 6, 5, 26 | tgelrnln 29098 | . . . . 5 ⊢ (𝜑 → (𝐴𝐿𝐶) ∈ ran 𝐿) |
| 28 | 27 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → (𝐴𝐿𝐶) ∈ ran 𝐿) |
| 29 | 1, 2, 3, 4, 7, 5, 6, 8 | ncoltgdim2 29028 | . . . . . . . 8 ⊢ (𝜑 → 𝐺DimTarskiG≥2) |
| 30 | 1, 14, 3, 4, 29, 6, 5 | midcl 29282 | . . . . . . 7 ⊢ (𝜑 → (𝐴(midG‘𝐺)𝐶) ∈ 𝑃) |
| 31 | 1, 2, 3, 4, 7, 5, 6, 8 | ncoltgdim2 29028 | . . . . . . . 8 ⊢ (𝜑 → 𝐺DimTarskiG≥2) |
| 32 | 1, 14, 3, 4, 31, 6, 5 | midbtwn 29284 | . . . . . . 7 ⊢ (𝜑 → (𝐴(midG‘𝐺)𝐶) ∈ (𝐴𝐼𝐶)) |
| 33 | 1, 2, 3, 4, 6, 5, 30, 32 | btwncolg1 29018 | . . . . . 6 ⊢ (𝜑 → ((𝐴(midG‘𝐺)𝐶) ∈ (𝐴𝐿𝐶) ∨ 𝐴 = 𝐶)) |
| 34 | 1, 3, 2, 4, 6, 7, 5, 8 | ncolne2 29094 | . . . . . . 7 ⊢ (𝜑 → 𝐴 ≠ 𝐶) |
| 35 | 34 | neneqd 2960 | . . . . . 6 ⊢ (𝜑 → ¬ 𝐴 = 𝐶) |
| 36 | 33, 35 | olcnd 891 | . . . . 5 ⊢ (𝜑 → (𝐴(midG‘𝐺)𝐶) ∈ (𝐴𝐿𝐶)) |
| 37 | 36 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → (𝐴(midG‘𝐺)𝐶) ∈ (𝐴𝐿𝐶)) |
| 38 | simpr 490 | . . . 4 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) | |
| 39 | 1, 14, 3, 2, 23, 24, 25, 28, 37, 38 | mirln 29148 | . . 3 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘(((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵)) ∈ (𝐴𝐿𝐶)) |
| 40 | 22, 39 | eqeltrrd 2861 | . 2 ⊢ ((𝜑 ∧ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) → 𝐵 ∈ (𝐴𝐿𝐶)) |
| 41 | 13, 40 | mtand 828 | 1 ⊢ (𝜑 → ¬ (((pInvG‘𝐺)‘(𝐴(midG‘𝐺)𝐶))‘𝐵) ∈ (𝐴𝐿𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∨ wo 861 = wceq 1569 ∈ wcel 2144 ran crn 5651 ‘cfv 6538 (class class class)co 7420 Basecbs 17387 distcds 17437 TarskiGcstrkg 28889 Itvcitv 28895 LineGclng 28896 pInvGcmir 29124 midGcmid 29277 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-tp 4588 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-oadd 8480 df-er 8717 df-map 8849 df-pm 8850 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-dju 9982 df-card 10020 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-3 12406 df-n0 12607 df-xnn0 12680 df-z 12694 df-uz 12966 df-fz 13640 df-fzo 13789 df-hash 14475 df-word 14659 df-concat 14716 df-s1 14743 df-s2 14999 df-s3 15000 df-trkgc 28910 df-trkgb 28911 df-trkgcb 28912 df-trkgld 28914 df-trkg 28915 df-cgrg 28974 df-leg 29046 df-mir 29125 df-rag 29169 df-perpg 29171 df-mid 29279 |
| This theorem is used by: tgextahp 33073 |
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