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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rpnnen3lem | Structured version Visualization version GIF version | ||
| Description: Lemma for rpnnen3 43711. (Contributed by Stefan O'Rear, 18-Jan-2015.) |
| Ref | Expression |
|---|---|
| rpnnen3lem | ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑎 < 𝑏) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | qbtwnre 13228 | . . 3 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) → ∃𝑑 ∈ ℚ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) | |
| 2 | simp2 1153 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 ∈ ℚ) | |
| 3 | simp3r 1219 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 < 𝑏) | |
| 4 | breq1 5117 | . . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐 < 𝑏 ↔ 𝑑 < 𝑏)) | |
| 5 | 4 | elrab 3658 | . . . . . . 7 ⊢ (𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ↔ (𝑑 ∈ ℚ ∧ 𝑑 < 𝑏)) |
| 6 | 2, 3, 5 | sylanbrc 594 | . . . . . 6 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 7 | simp11 1220 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑎 ∈ ℝ) | |
| 8 | qre 12980 | . . . . . . . . . 10 ⊢ (𝑑 ∈ ℚ → 𝑑 ∈ ℝ) | |
| 9 | 8 | 3ad2ant2 1150 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 ∈ ℝ) |
| 10 | simp3l 1218 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑎 < 𝑑) | |
| 11 | 7, 9, 10 | ltnsymd 11362 | . . . . . . . 8 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → ¬ 𝑑 < 𝑎) |
| 12 | 11 | intnand 493 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → ¬ (𝑑 ∈ ℚ ∧ 𝑑 < 𝑎)) |
| 13 | breq1 5117 | . . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐 < 𝑎 ↔ 𝑑 < 𝑎)) | |
| 14 | 13 | elrab 3658 | . . . . . . 7 ⊢ (𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ↔ (𝑑 ∈ ℚ ∧ 𝑑 < 𝑎)) |
| 15 | 12, 14 | sylnibr 332 | . . . . . 6 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → ¬ 𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) |
| 16 | nelne1 3062 | . . . . . 6 ⊢ ((𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ∧ ¬ 𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) | |
| 17 | 6, 15, 16 | syl2anc 595 | . . . . 5 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) |
| 18 | 17 | necomd 3020 | . . . 4 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 19 | 18 | rexlimdv3a 3177 | . . 3 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) → (∃𝑑 ∈ ℚ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏})) |
| 20 | 1, 19 | mpd 16 | . 2 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 21 | 20 | 3expa 1134 | 1 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑎 < 𝑏) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 400 ∧ w3a 1101 ∈ wcel 2150 ≠ wne 2965 ∃wrex 3096 {crab 3423 class class class wbr 5114 ℝcr 11102 < clt 11246 ℚcq 12975 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 ax-cnex 11159 ax-resscn 11160 ax-1cn 11161 ax-icn 11162 ax-addcl 11163 ax-addrcl 11164 ax-mulcl 11165 ax-mulrcl 11166 ax-mulcom 11167 ax-addass 11168 ax-mulass 11169 ax-distr 11170 ax-i2m1 11171 ax-1ne0 11172 ax-1rid 11173 ax-rnegex 11174 ax-rrecex 11175 ax-cnre 11176 ax-pre-lttri 11177 ax-pre-lttrn 11178 ax-pre-ltadd 11179 ax-pre-mulgt0 11180 ax-pre-sup 11181 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-nel 3072 df-ral 3087 df-rex 3097 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8697 df-en 8947 df-dom 8948 df-sdom 8949 df-sup 9405 df-inf 9406 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11446 df-neg 11447 df-div 11875 df-nn 12237 df-n0 12508 df-z 12595 df-uz 12866 df-q 12976 |
| This theorem is referenced by: rpnnen3 43711 |
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