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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 23218 | . . . 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 22895 | . . 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 24741 | . . . 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 23227 | . 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 5626 ⟶wf 6489 ‘cfv 6493 (class class class)co 7361 ℝcr 11031 (,)cioo 13292 topGenctg 17394 Topctop 22871 TopOnctopon 22888 Cn ccn 23202 |
| 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 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-pre-lttri 11106 ax-pre-lttrn 11107 |
| 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 5520 df-po 5533 df-so 5534 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-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-ov 7364 df-oprab 7365 df-mpo 7366 df-1st 7936 df-2nd 7937 df-er 8637 df-map 8769 df-en 8888 df-dom 8889 df-sdom 8890 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-ioo 13296 df-topgen 17400 df-top 22872 df-topon 22889 df-bases 22924 df-cn 23205 |
| This theorem is referenced by: rfcnpre2 45483 cncmpmax 45484 rfcnpre3 45485 rfcnpre4 45486 rfcnnnub 45488 stoweidlem28 46477 stoweidlem29 46478 stoweidlem36 46485 stoweidlem43 46492 stoweidlem44 46493 stoweidlem47 46496 stoweidlem52 46501 stoweidlem57 46506 stoweidlem59 46508 stoweidlem60 46509 stoweidlem61 46510 stoweidlem62 46511 stoweid 46512 |
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