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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rpnnen3lem | Structured version Visualization version GIF version | ||
| Description: Lemma for rpnnen3 43023. (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 13220 | . . 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 5127 | . . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐 < 𝑏 ↔ 𝑑 < 𝑏)) | |
| 5 | 4 | elrab 3676 | . . . . . . 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 12974 | . . . . . . . . . 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 11389 | . . . . . . . 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 5127 | . . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐 < 𝑎 ↔ 𝑑 < 𝑎)) | |
| 14 | 13 | elrab 3676 | . . . . . . 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 3030 | . . . . . 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 2988 | . . . 4 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ ∧ 𝑎 < 𝑏) ∧ 𝑑 ∈ ℚ ∧ (𝑎 < 𝑑 ∧ 𝑑 < 𝑏)) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 19 | 18 | rexlimdv3a 3146 | . . 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 2933 ∃wrex 3061 {crab 3420 class class class wbr 5124 ℝcr 11133 < clt 11274 ℚcq 12969 |
| 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 2708 ax-sep 5271 ax-nul 5281 ax-pow 5340 ax-pr 5407 ax-un 7734 ax-cnex 11190 ax-resscn 11191 ax-1cn 11192 ax-icn 11193 ax-addcl 11194 ax-addrcl 11195 ax-mulcl 11196 ax-mulrcl 11197 ax-mulcom 11198 ax-addass 11199 ax-mulass 11200 ax-distr 11201 ax-i2m1 11202 ax-1ne0 11203 ax-1rid 11204 ax-rnegex 11205 ax-rrecex 11206 ax-cnre 11207 ax-pre-lttri 11208 ax-pre-lttrn 11209 ax-pre-ltadd 11210 ax-pre-mulgt0 11211 ax-pre-sup 11212 |
| 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 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3364 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-pss 3951 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4889 df-iun 4974 df-br 5125 df-opab 5187 df-mpt 5207 df-tr 5235 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6295 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7867 df-1st 7993 df-2nd 7994 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-er 8724 df-en 8965 df-dom 8966 df-sdom 8967 df-sup 9459 df-inf 9460 df-pnf 11276 df-mnf 11277 df-xr 11278 df-ltxr 11279 df-le 11280 df-sub 11473 df-neg 11474 df-div 11900 df-nn 12246 df-n0 12507 df-z 12594 df-uz 12858 df-q 12970 |
| This theorem is referenced by: rpnnen3 43023 |
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