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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 2872 | . . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐽 Cn 𝐾)) |
| 4 | cntop1 23300 | . . . 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 22977 | . . 3 ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑇)) |
| 8 | 5, 7 | sylib 220 | . 2 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑇)) |
| 9 | fcnre.1 | . . . 4 ⊢ 𝐾 = (topGen‘ran (,)) | |
| 10 | retopon 24823 | . . . 4 ⊢ (topGen‘ran (,)) ∈ (TopOn‘ℝ) | |
| 11 | 9, 10 | eqeltri 2858 | . . 3 ⊢ 𝐾 ∈ (TopOn‘ℝ) |
| 12 | 11 | a1i 11 | . 2 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘ℝ)) |
| 13 | cnf2 23309 | . 2 ⊢ ((𝐽 ∈ (TopOn‘𝑇) ∧ 𝐾 ∈ (TopOn‘ℝ) ∧ 𝐹 ∈ (𝐽 Cn 𝐾)) → 𝐹:𝑇⟶ℝ) | |
| 14 | 8, 12, 3, 13 | syl3anc 1390 | 1 ⊢ (𝜑 → 𝐹:𝑇⟶ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1560 ∈ wcel 2142 ∪ cuni 4865 ran crn 5648 ⟶wf 6517 ‘cfv 6521 (class class class)co 7396 ℝcr 11072 (,)cioo 13349 topGenctg 17466 Topctop 22953 TopOnctopon 22970 Cn ccn 23284 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-cnex 11129 ax-resscn 11130 ax-pre-lttri 11147 ax-pre-lttrn 11148 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5542 df-po 5555 df-so 5556 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-ov 7399 df-oprab 7400 df-mpo 7401 df-1st 7970 df-2nd 7971 df-er 8678 df-map 8810 df-en 8928 df-dom 8929 df-sdom 8930 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-le 11222 df-ioo 13353 df-topgen 17472 df-top 22954 df-topon 22971 df-bases 23006 df-cn 23287 |
| This theorem is referenced by: rfcnpre2 45611 cncmpmax 45612 rfcnpre3 45613 rfcnpre4 45614 rfcnnnub 45616 stoweidlem28 46602 stoweidlem29 46603 stoweidlem36 46610 stoweidlem43 46617 stoweidlem44 46618 stoweidlem47 46621 stoweidlem52 46626 stoweidlem57 46631 stoweidlem59 46633 stoweidlem60 46634 stoweidlem61 46635 stoweidlem62 46636 stoweid 46637 |
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