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| Mirrors > Home > MPE Home > Th. List > Mathboxes > btwntriv2 | Structured version Visualization version GIF version | ||
| Description: Betweenness always holds for the second endpoint. Theorem 3.1 of [Schwabhauser] p. 30. (Contributed by Scott Fenton, 12-Jun-2013.) |
| Ref | Expression |
|---|---|
| btwntriv2 | ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) → 𝐵 Btwn 〈𝐴, 𝐵〉) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simp1 1149 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) → 𝑁 ∈ ℕ) | |
| 2 | simp2 1150 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) → 𝐴 ∈ (𝔼‘𝑁)) | |
| 3 | simp3 1151 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) → 𝐵 ∈ (𝔼‘𝑁)) | |
| 4 | axsegcon 29125 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ (𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ (𝐵 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁))) → ∃𝑥 ∈ (𝔼‘𝑁)(𝐵 Btwn 〈𝐴, 𝑥〉 ∧ 〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉)) | |
| 5 | 1, 2, 3, 3, 3, 4 | syl122anc 1398 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) → ∃𝑥 ∈ (𝔼‘𝑁)(𝐵 Btwn 〈𝐴, 𝑥〉 ∧ 〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉)) |
| 6 | simpl1 1205 | . . . . . . 7 ⊢ (((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ 𝑥 ∈ (𝔼‘𝑁)) → 𝑁 ∈ ℕ) | |
| 7 | simpl3 1207 | . . . . . . 7 ⊢ (((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ 𝑥 ∈ (𝔼‘𝑁)) → 𝐵 ∈ (𝔼‘𝑁)) | |
| 8 | simpr 488 | . . . . . . 7 ⊢ (((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ 𝑥 ∈ (𝔼‘𝑁)) → 𝑥 ∈ (𝔼‘𝑁)) | |
| 9 | axcgrid 29114 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ (𝐵 ∈ (𝔼‘𝑁) ∧ 𝑥 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁))) → (〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉 → 𝐵 = 𝑥)) | |
| 10 | 6, 7, 8, 7, 9 | syl13anc 1391 | . . . . . 6 ⊢ (((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ 𝑥 ∈ (𝔼‘𝑁)) → (〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉 → 𝐵 = 𝑥)) |
| 11 | opeq2 4832 | . . . . . . . 8 ⊢ (𝐵 = 𝑥 → 〈𝐴, 𝐵〉 = 〈𝐴, 𝑥〉) | |
| 12 | 11 | breq2d 5112 | . . . . . . 7 ⊢ (𝐵 = 𝑥 → (𝐵 Btwn 〈𝐴, 𝐵〉 ↔ 𝐵 Btwn 〈𝐴, 𝑥〉)) |
| 13 | 12 | biimprd 250 | . . . . . 6 ⊢ (𝐵 = 𝑥 → (𝐵 Btwn 〈𝐴, 𝑥〉 → 𝐵 Btwn 〈𝐴, 𝐵〉)) |
| 14 | 10, 13 | syl6 35 | . . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ 𝑥 ∈ (𝔼‘𝑁)) → (〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉 → (𝐵 Btwn 〈𝐴, 𝑥〉 → 𝐵 Btwn 〈𝐴, 𝐵〉))) |
| 15 | 14 | impd 414 | . . . 4 ⊢ (((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ 𝑥 ∈ (𝔼‘𝑁)) → ((〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉 ∧ 𝐵 Btwn 〈𝐴, 𝑥〉) → 𝐵 Btwn 〈𝐴, 𝐵〉)) |
| 16 | 15 | ancomsd 469 | . . 3 ⊢ (((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) ∧ 𝑥 ∈ (𝔼‘𝑁)) → ((𝐵 Btwn 〈𝐴, 𝑥〉 ∧ 〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉) → 𝐵 Btwn 〈𝐴, 𝐵〉)) |
| 17 | 16 | rexlimdva 3163 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) → (∃𝑥 ∈ (𝔼‘𝑁)(𝐵 Btwn 〈𝐴, 𝑥〉 ∧ 〈𝐵, 𝑥〉Cgr〈𝐵, 𝐵〉) → 𝐵 Btwn 〈𝐴, 𝐵〉)) |
| 18 | 5, 17 | mpd 15 | 1 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ (𝔼‘𝑁) ∧ 𝐵 ∈ (𝔼‘𝑁)) → 𝐵 Btwn 〈𝐴, 𝐵〉) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1098 = wceq 1560 ∈ wcel 2142 ∃wrex 3086 〈cop 4588 class class class wbr 5100 ‘cfv 6521 ℕcn 12210 𝔼cee 29085 Btwn cbtwn 29086 Cgrccgr 29087 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5227 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-inf2 9596 ax-cnex 11129 ax-resscn 11130 ax-1cn 11131 ax-icn 11132 ax-addcl 11133 ax-addrcl 11134 ax-mulcl 11135 ax-mulrcl 11136 ax-mulcom 11137 ax-addass 11138 ax-mulass 11139 ax-distr 11140 ax-i2m1 11141 ax-1ne0 11142 ax-1rid 11143 ax-rnegex 11144 ax-rrecex 11145 ax-cnre 11146 ax-pre-lttri 11147 ax-pre-lttrn 11148 ax-pre-ltadd 11149 ax-pre-mulgt0 11150 ax-pre-sup 11151 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4906 df-iun 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-se 5601 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6288 df-ord 6349 df-on 6350 df-lim 6351 df-suc 6352 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-isom 6530 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-om 7847 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8381 df-1o 8437 df-er 8678 df-map 8810 df-en 8928 df-dom 8929 df-sdom 8930 df-fin 8931 df-sup 9388 df-oi 9458 df-card 9897 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-le 11222 df-sub 11416 df-neg 11417 df-div 11845 df-nn 12211 df-2 12280 df-3 12281 df-n0 12482 df-z 12569 df-uz 12840 df-rp 12994 df-ico 13355 df-icc 13356 df-fz 13513 df-fzo 13660 df-seq 14015 df-exp 14075 df-hash 14344 df-cj 15126 df-re 15127 df-im 15128 df-sqrt 15262 df-abs 15263 df-clim 15515 df-sum 15714 df-ee 29088 df-btwn 29089 df-cgr 29090 |
| This theorem is referenced by: btwncomim 36360 btwntriv1 36363 seglerflx 36459 colinbtwnle 36465 broutsideof2 36469 |
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