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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 2847 | . . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐽 Cn 𝐾)) |
| 4 | cntop1 23207 | . . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ Top) | |
| 5 | 3, 4 | syl 17 | . . 3 ⊢ (𝜑 → 𝐽 ∈ Top) |
| 6 | fcnre.3 | . . . 4 ⊢ 𝑇 = ∪ 𝐽 | |
| 7 | 6 | toptopon 22884 | . . 3 ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑇)) |
| 8 | 5, 7 | sylib 218 | . 2 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑇)) |
| 9 | fcnre.1 | . . . 4 ⊢ 𝐾 = (topGen‘ran (,)) | |
| 10 | retopon 24730 | . . . 4 ⊢ (topGen‘ran (,)) ∈ (TopOn‘ℝ) | |
| 11 | 9, 10 | eqeltri 2833 | . . 3 ⊢ 𝐾 ∈ (TopOn‘ℝ) |
| 12 | 11 | a1i 11 | . 2 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘ℝ)) |
| 13 | cnf2 23216 | . 2 ⊢ ((𝐽 ∈ (TopOn‘𝑇) ∧ 𝐾 ∈ (TopOn‘ℝ) ∧ 𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐹:𝑇⟶ℝ) | |
| 14 | 8, 12, 3, 13 | syl3anc 1374 | 1 ⊢ (𝜑 → 𝐹:𝑇⟶ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ∪ cuni 4851 ran crn 5633 ⟶wf 6496 ‘cfv 6500 (class class class)co 7369 ℝcr 11039 (,)cioo 13300 topGenctg 17402 Topctop 22860 TopOnctopon 22877 Cn ccn 23191 |
| 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-sep 5232 ax-nul 5242 ax-pow 5308 ax-pr 5376 ax-un 7691 ax-cnex 11096 ax-resscn 11097 ax-pre-lttri 11114 ax-pre-lttrn 11115 |
| 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 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5527 df-po 5540 df-so 5541 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7372 df-oprab 7373 df-mpo 7374 df-1st 7944 df-2nd 7945 df-er 8645 df-map 8777 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11183 df-mnf 11184 df-xr 11185 df-ltxr 11186 df-le 11187 df-ioo 13304 df-topgen 17408 df-top 22861 df-topon 22878 df-bases 22913 df-cn 23194 |
| This theorem is referenced by: rfcnpre2 45464 cncmpmax 45465 rfcnpre3 45466 rfcnpre4 45467 rfcnnnub 45469 stoweidlem28 46458 stoweidlem29 46459 stoweidlem36 46466 stoweidlem43 46473 stoweidlem44 46474 stoweidlem47 46477 stoweidlem52 46482 stoweidlem57 46487 stoweidlem59 46489 stoweidlem60 46490 stoweidlem61 46491 stoweidlem62 46492 stoweid 46493 |
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