| Mathbox for Stefan O'Rear |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rpnnen3 | Structured version Visualization version GIF version | ||
| Description: Dedekind cut injection of ℝ into 𝒫 ℚ. (Contributed by Stefan O'Rear, 18-Jan-2015.) |
| Ref | Expression |
|---|---|
| rpnnen3 | ⊢ ℝ ≼ 𝒫 ℚ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | qex 12906 | . . 3 ⊢ ℚ ∈ V | |
| 2 | 1 | pwex 5312 | . 2 ⊢ 𝒫 ℚ ∈ V |
| 3 | ssrab2 4014 | . . . . 5 ⊢ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ⊆ ℚ | |
| 4 | 1 | elpw2 5265 | . . . . 5 ⊢ ({𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ∈ 𝒫 ℚ ↔ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ⊆ ℚ) |
| 5 | 3, 4 | mpbir 233 | . . . 4 ⊢ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ∈ 𝒫 ℚ |
| 6 | 5 | a1i 11 | . . 3 ⊢ (𝑎 ∈ ℝ → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ∈ 𝒫 ℚ) |
| 7 | lttri2 11223 | . . . . . 6 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (𝑎 ≠ 𝑏 ↔ (𝑎 < 𝑏 ∨ 𝑏 < 𝑎))) | |
| 8 | rpnnen3lem 43491 | . . . . . . . 8 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑎 < 𝑏) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) | |
| 9 | rpnnen3lem 43491 | . . . . . . . . . 10 ⊢ (((𝑏 ∈ ℝ ∧ 𝑎 ∈ ℝ) ∧ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) | |
| 10 | 9 | ancom1s 660 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) |
| 11 | 10 | necomd 2991 | . . . . . . . 8 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 12 | 8, 11 | jaodan 966 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ (𝑎 < 𝑏 ∨ 𝑏 < 𝑎)) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 13 | 12 | ex 414 | . . . . . 6 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → ((𝑎 < 𝑏 ∨ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏})) |
| 14 | 7, 13 | sylbid 242 | . . . . 5 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (𝑎 ≠ 𝑏 → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏})) |
| 15 | 14 | necon4d 2960 | . . . 4 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → ({𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} = {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} → 𝑎 = 𝑏)) |
| 16 | breq2 5079 | . . . . 5 ⊢ (𝑎 = 𝑏 → (𝑐 < 𝑎 ↔ 𝑐 < 𝑏)) | |
| 17 | 16 | rabbidv 3400 | . . . 4 ⊢ (𝑎 = 𝑏 → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} = {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 18 | 15, 17 | impbid1 227 | . . 3 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → ({𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} = {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ↔ 𝑎 = 𝑏)) |
| 19 | 6, 18 | dom2 8936 | . 2 ⊢ (𝒫 ℚ ∈ V → ℝ ≼ 𝒫 ℚ) |
| 20 | 2, 19 | ax-mp 5 | 1 ⊢ ℝ ≼ 𝒫 ℚ |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 397 ∨ wo 854 = wceq 1548 ∈ wcel 2121 ≠ wne 2936 {crab 3393 Vcvv 3433 ⊆ wss 3885 𝒫 cpw 4532 class class class wbr 5075 ≼ cdom 8885 ℝcr 11032 < clt 11174 ℚcq 12893 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7682 ax-cnex 11089 ax-resscn 11090 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-addrcl 11094 ax-mulcl 11095 ax-mulrcl 11096 ax-mulcom 11097 ax-addass 11098 ax-mulass 11099 ax-distr 11100 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rnegex 11104 ax-rrecex 11105 ax-cnre 11106 ax-pre-lttri 11107 ax-pre-lttrn 11108 ax-pre-ltadd 11109 ax-pre-mulgt0 11110 ax-pre-sup 11111 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-nel 3041 df-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-sup 9349 df-inf 9350 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-le 11180 df-sub 11374 df-neg 11375 df-div 11803 df-nn 12170 df-n0 12433 df-z 12520 df-uz 12784 df-q 12894 |
| This theorem is referenced by: (None) |
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