| 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 12878 | . . 3 ⊢ ℚ ∈ V | |
| 2 | 1 | pwex 5326 | . 2 ⊢ 𝒫 ℚ ∈ V |
| 3 | ssrab2 4033 | . . . . 5 ⊢ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ⊆ ℚ | |
| 4 | 1 | elpw2 5280 | . . . . 5 ⊢ ({𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ∈ 𝒫 ℚ ↔ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ⊆ ℚ) |
| 5 | 3, 4 | mpbir 231 | . . . 4 ⊢ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ∈ 𝒫 ℚ |
| 6 | 5 | a1i 11 | . . 3 ⊢ (𝑎 ∈ ℝ → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ∈ 𝒫 ℚ) |
| 7 | lttri2 11219 | . . . . . 6 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (𝑎 ≠ 𝑏 ↔ (𝑎 < 𝑏 ∨ 𝑏 < 𝑎))) | |
| 8 | rpnnen3lem 43340 | . . . . . . . 8 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑎 < 𝑏) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) | |
| 9 | rpnnen3lem 43340 | . . . . . . . . . 10 ⊢ (((𝑏 ∈ ℝ ∧ 𝑎 ∈ ℝ) ∧ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) | |
| 10 | 9 | ancom1s 654 | . . . . . . . . 9 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎}) |
| 11 | 10 | necomd 2988 | . . . . . . . 8 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 12 | 8, 11 | jaodan 960 | . . . . . . 7 ⊢ (((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) ∧ (𝑎 < 𝑏 ∨ 𝑏 < 𝑎)) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 13 | 12 | ex 412 | . . . . . 6 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → ((𝑎 < 𝑏 ∨ 𝑏 < 𝑎) → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏})) |
| 14 | 7, 13 | sylbid 240 | . . . . 5 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → (𝑎 ≠ 𝑏 → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} ≠ {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏})) |
| 15 | 14 | necon4d 2957 | . . . 4 ⊢ ((𝑎 ∈ ℝ ∧ 𝑏 ∈ ℝ) → ({𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} = {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏} → 𝑎 = 𝑏)) |
| 16 | breq2 5103 | . . . . 5 ⊢ (𝑎 = 𝑏 → (𝑐 < 𝑎 ↔ 𝑐 < 𝑏)) | |
| 17 | 16 | rabbidv 3407 | . . . 4 ⊢ (𝑎 = 𝑏 → {𝑐 ∈ ℚ ∣ 𝑐 < 𝑎} = {𝑐 ∈ ℚ ∣ 𝑐 < 𝑏}) |
| 18 | 15, 17 | impbid1 225 | . . 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 395 ∨ wo 848 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 {crab 3400 Vcvv 3441 ⊆ wss 3902 𝒫 cpw 4555 class class class wbr 5099 ≼ cdom 8885 ℝcr 11029 < clt 11170 ℚcq 12865 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 ax-pre-sup 11108 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 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 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12150 df-n0 12406 df-z 12493 df-uz 12756 df-q 12866 |
| This theorem is referenced by: (None) |
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