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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rpnnen3lem | Structured version Visualization version GIF version | ||
| Description: Lemma for rpnnen3 43014. (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 13135 | . . 3 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) → ∃𝑑 ∈ ℚ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) | |
| 2 | simp2 1137 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 ∈ ℚ) | |
| 3 | simp3r 1203 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 < 𝑏) | |
| 4 | breq1 5105 | . . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐 < 𝑏 ↔ 𝑑 < 𝑏)) | |
| 5 | 4 | elrab 3656 | . . . . . . 7 ⊢ (𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ↔ (𝑑 ∈ ℚ ∧ 𝑑 < 𝑏)) |
| 6 | 2, 3, 5 | sylanbrc 583 | . . . . . 6 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 7 | simp11 1204 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑎 ∈ ℝ) | |
| 8 | qre 12888 | . . . . . . . . . 10 ⊢ (𝑑 ∈ ℚ → 𝑑 ∈ ℝ) | |
| 9 | 8 | 3ad2ant2 1134 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑑 ∈ ℝ) |
| 10 | simp3l 1202 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → 𝑎 < 𝑑) | |
| 11 | 7, 9, 10 | ltnsymd 11299 | . . . . . . . 8 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → ¬ 𝑑 < 𝑎) |
| 12 | 11 | intnand 488 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → ¬ (𝑑 ∈ ℚ ∧ 𝑑 < 𝑎)) |
| 13 | breq1 5105 | . . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐 < 𝑎 ↔ 𝑑 < 𝑎)) | |
| 14 | 13 | elrab 3656 | . . . . . . 7 ⊢ (𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ↔ (𝑑 ∈ ℚ ∧ 𝑑 < 𝑎)) |
| 15 | 12, 14 | sylnibr 329 | . . . . . 6 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → ¬ 𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) |
| 16 | nelne1 3022 | . . . . . 6 ⊢ ((𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ∧ ¬ 𝑑 ∈ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) | |
| 17 | 6, 15, 16 | syl2anc 584 | . . . . 5 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) |
| 18 | 17 | necomd 2980 | . . . 4 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 19 | 18 | rexlimdv3a 3138 | . . 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 15 | . 2 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 21 | 20 | 3expa 1118 | 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 395 ∧ w3a 1086 ∈ wcel 2109 ≠ wne 2925 ∃wrex 3053 {crab 3402 class class class wbr 5102 ℝcr 11043 < clt 11184 ℚcq 12883 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121 ax-pre-sup 11122 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7823 df-1st 7947 df-2nd 7948 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-er 8648 df-en 8896 df-dom 8897 df-sdom 8898 df-sup 9369 df-inf 9370 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-div 11812 df-nn 12163 df-n0 12419 df-z 12506 df-uz 12770 df-q 12884 |
| This theorem is referenced by: rpnnen3 43014 |
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