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| Mirrors > Home > MPE Home > Th. List > rpnnen1lem4 | Structured version Visualization version GIF version | ||
| Description: Lemma for rpnnen1 13035. (Contributed by Mario Carneiro, 12-May-2013.) (Revised by NM, 13-Aug-2021.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| rpnnen1lem.1 | ⊢ 𝑇 = {𝑛 ∈ ℤ ∣ (𝑛 / 𝑘) < 𝑥} |
| rpnnen1lem.2 | ⊢ 𝐹 = (𝑥 ∈ ℝ ↦ (𝑘 ∈ ℕ ↦ (sup(𝑇, ℝ, < ) / 𝑘))) |
| rpnnen1lem.n | ⊢ ℕ ∈ V |
| rpnnen1lem.q | ⊢ ℚ ∈ V |
| Ref | Expression |
|---|---|
| rpnnen1lem4 | ⊢ (𝑥 ∈ ℝ → sup(ran (𝐹‘𝑥), ℝ, < ) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rpnnen1lem.1 | . . . . 5 ⊢ 𝑇 = {𝑛 ∈ ℤ ∣ (𝑛 / 𝑘) < 𝑥} | |
| 2 | rpnnen1lem.2 | . . . . 5 ⊢ 𝐹 = (𝑥 ∈ ℝ ↦ (𝑘 ∈ ℕ ↦ (sup(𝑇, ℝ, < ) / 𝑘))) | |
| 3 | rpnnen1lem.n | . . . . 5 ⊢ ℕ ∈ V | |
| 4 | rpnnen1lem.q | . . . . 5 ⊢ ℚ ∈ V | |
| 5 | 1, 2, 3, 4 | rpnnen1lem1 13030 | . . . 4 ⊢ (𝑥 ∈ ℝ → (𝐹‘𝑥) ∈ (ℚ ↑m ℕ)) |
| 6 | 4, 3 | elmap 8881 | . . . 4 ⊢ ((𝐹‘𝑥) ∈ (ℚ ↑m ℕ) ↔ (𝐹‘𝑥):ℕ⟶ℚ) |
| 7 | 5, 6 | sylib 221 | . . 3 ⊢ (𝑥 ∈ ℝ → (𝐹‘𝑥):ℕ⟶ℚ) |
| 8 | frn 6714 | . . . 4 ⊢ ((𝐹‘𝑥):ℕ⟶ℚ → ran (𝐹‘𝑥) ⊆ ℚ) | |
| 9 | qssre 13011 | . . . 4 ⊢ ℚ ⊆ ℝ | |
| 10 | 8, 9 | sstrdi 3946 | . . 3 ⊢ ((𝐹‘𝑥):ℕ⟶ℚ → ran (𝐹‘𝑥) ⊆ ℝ) |
| 11 | 7, 10 | syl 18 | . 2 ⊢ (𝑥 ∈ ℝ → ran (𝐹‘𝑥) ⊆ ℝ) |
| 12 | 1nn 12271 | . . . . . 6 ⊢ 1 ∈ ℕ | |
| 13 | 12 | ne0ii 4293 | . . . . 5 ⊢ ℕ ≠ ∅ |
| 14 | fdm 6716 | . . . . . 6 ⊢ ((𝐹‘𝑥):ℕ⟶ℚ → dom (𝐹‘𝑥) = ℕ) | |
| 15 | 14 | neeq1d 3016 | . . . . 5 ⊢ ((𝐹‘𝑥):ℕ⟶ℚ → (dom (𝐹‘𝑥) ≠ ∅ ↔ ℕ ≠ ∅)) |
| 16 | 13, 15 | mpbiri 261 | . . . 4 ⊢ ((𝐹‘𝑥):ℕ⟶ℚ → dom (𝐹‘𝑥) ≠ ∅) |
| 17 | dm0rn0 5912 | . . . . 5 ⊢ (dom (𝐹‘𝑥) = ∅ ↔ ran (𝐹‘𝑥) = ∅) | |
| 18 | 17 | necon3bii 3009 | . . . 4 ⊢ (dom (𝐹‘𝑥) ≠ ∅ ↔ ran (𝐹‘𝑥) ≠ ∅) |
| 19 | 16, 18 | sylib 221 | . . 3 ⊢ ((𝐹‘𝑥):ℕ⟶ℚ → ran (𝐹‘𝑥) ≠ ∅) |
| 20 | 7, 19 | syl 18 | . 2 ⊢ (𝑥 ∈ ℝ → ran (𝐹‘𝑥) ≠ ∅) |
| 21 | 1, 2, 3, 4 | rpnnen1lem3 13031 | . . 3 ⊢ (𝑥 ∈ ℝ → ∀𝑛 ∈ ran (𝐹‘𝑥)𝑛 ≤ 𝑥) |
| 22 | breq2 5111 | . . . . 5 ⊢ (𝑦 = 𝑥 → (𝑛 ≤ 𝑦 ↔ 𝑛 ≤ 𝑥)) | |
| 23 | 22 | ralbidv 3187 | . . . 4 ⊢ (𝑦 = 𝑥 → (∀𝑛 ∈ ran (𝐹‘𝑥)𝑛 ≤ 𝑦 ↔ ∀𝑛 ∈ ran (𝐹‘𝑥)𝑛 ≤ 𝑥)) |
| 24 | 23 | rspcev 3579 | . . 3 ⊢ ((𝑥 ∈ ℝ ∧ ∀𝑛 ∈ ran (𝐹‘𝑥)𝑛 ≤ 𝑥) → ∃𝑦 ∈ ℝ ∀𝑛 ∈ ran (𝐹‘𝑥)𝑛 ≤ 𝑦) |
| 25 | 21, 24 | mpdan 700 | . 2 ⊢ (𝑥 ∈ ℝ → ∃𝑦 ∈ ℝ ∀𝑛 ∈ ran (𝐹‘𝑥)𝑛 ≤ 𝑦) |
| 26 | suprcl 12202 | . 2 ⊢ ((ran (𝐹‘𝑥) ⊆ ℝ ∧ ran (𝐹‘𝑥) ≠ ∅ ∧ ∃𝑦 ∈ ℝ ∀𝑛 ∈ ran (𝐹‘𝑥)𝑛 ≤ 𝑦) → sup(ran (𝐹‘𝑥), ℝ, < ) ∈ ℝ) | |
| 27 | 11, 20, 25, 26 | syl3anc 1398 | 1 ⊢ (𝑥 ∈ ℝ → sup(ran (𝐹‘𝑥), ℝ, < ) ∈ ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ≠ wne 2957 ∀wral 3078 ∃wrex 3088 {crab 3414 Vcvv 3453 ⊆ wss 3902 ∅c0 4282 class class class wbr 5107 ↦ cmpt 5190 dom cdm 5659 ran crn 5660 ⟶wf 6533 ‘cfv 6537 (class class class)co 7416 ↑m cmap 8829 supcsup 9413 ℝcr 11126 1c1 11128 < clt 11270 ≤ cle 11271 / cdiv 11898 ℕcn 12260 ℤcz 12618 ℚcq 13000 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 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 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8699 df-map 8831 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9415 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-n0 12532 df-z 12619 df-q 13001 |
| This theorem is used by: rpnnen1lem5 13033 |
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