| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fcnre | Structured version Visualization version GIF version | ||
| Description: A function continuous with respect to the standard topology, is a real mapping. (Contributed by Glauco Siliprandi, 20-Apr-2017.) |
| Ref | Expression |
|---|---|
| fcnre.1 | ⊢ 𝐾 = (topGen‘ran (,)) |
| fcnre.3 | ⊢ 𝑇 = ∪ 𝐽 |
| sfcnre.5 | ⊢ 𝐶 = (𝐽 Cn 𝐾) |
| fcnre.6 | ⊢ (𝜑 → 𝐹 ∈ 𝐶) |
| Ref | Expression |
|---|---|
| fcnre | ⊢ (𝜑 → 𝐹:𝑇⟶ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fcnre.6 | . . . . 5 ⊢ (𝜑 → 𝐹 ∈ 𝐶) | |
| 2 | sfcnre.5 | . . . . 5 ⊢ 𝐶 = (𝐽 Cn 𝐾) | |
| 3 | 1, 2 | eleqtrdi 2874 | . . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐽 Cn 𝐾)) |
| 4 | cntop1 23573 | . . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ Top) | |
| 5 | 3, 4 | syl 18 | . . 3 ⊢ (𝜑 → 𝐽 ∈ Top) |
| 6 | fcnre.3 | . . . 4 ⊢ 𝑇 = ∪ 𝐽 | |
| 7 | 6 | toptopon 23250 | . . 3 ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑇)) |
| 8 | 5, 7 | sylib 221 | . 2 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑇)) |
| 9 | fcnre.1 | . . . 4 ⊢ 𝐾 = (topGen‘ran (,)) | |
| 10 | retopon 25097 | . . . 4 ⊢ (topGen‘ran (,)) ∈ (TopOn‘ℝ) | |
| 11 | 9, 10 | eqeltri 2860 | . . 3 ⊢ 𝐾 ∈ (TopOn‘ℝ) |
| 12 | 11 | a1i 11 | . 2 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘ℝ)) |
| 13 | cnf2 23582 | . 2 ⊢ ((𝐽 ∈ (TopOn‘𝑇) ∧ 𝐾 ∈ (TopOn‘ℝ) ∧ 𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐹:𝑇⟶ℝ) | |
| 14 | 8, 12, 3, 13 | syl3anc 1398 | 1 ⊢ (𝜑 → 𝐹:𝑇⟶ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2146 ∪ cuni 4870 ran crn 5656 ⟶wf 6543 ‘cfv 6547 (class class class)co 7430 ℝcr 11212 (,)cioo 13489 topGenctg 17623 Topctop 23226 TopOnctopon 23243 Cn ccn 23557 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-cnex 11269 ax-resscn 11270 ax-pre-lttri 11287 ax-pre-lttrn 11288 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-po 5563 df-so 5564 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-ov 7433 df-oprab 7434 df-mpo 7435 df-1st 8011 df-2nd 8012 df-er 8731 df-map 8863 df-en 8988 df-dom 8989 df-sdom 8990 df-pnf 11358 df-mnf 11359 df-xr 11360 df-ltxr 11361 df-le 11362 df-ioo 13493 df-topgen 17629 df-top 23227 df-topon 23244 df-bases 23279 df-cn 23560 |
| This theorem is used by: rfcnpre2 46190 cncmpmax 46191 rfcnpre3 46192 rfcnpre4 46193 rfcnnnub 46195 stoweidlem28 47180 stoweidlem29 47181 stoweidlem36 47188 stoweidlem43 47195 stoweidlem44 47196 stoweidlem47 47199 stoweidlem52 47204 stoweidlem57 47209 stoweidlem59 47211 stoweidlem60 47212 stoweidlem61 47213 stoweidlem62 47214 stoweid 47215 |
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