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| Mirrors > Home > HSE Home > Th. List > elcnfn | Structured version Visualization version GIF version | ||
| Description: Property defining a continuous functional. (Contributed by NM, 11-Feb-2006.) (Revised by Mario Carneiro, 16-Nov-2013.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| elcnfn | ⊢ (𝑇 ∈ ContFn ↔ (𝑇: ℋ⟶ℂ ∧ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq1 6878 | . . . . . . . . 9 ⊢ (𝑡 = 𝑇 → (𝑡‘𝑤) = (𝑇‘𝑤)) | |
| 2 | fveq1 6878 | . . . . . . . . 9 ⊢ (𝑡 = 𝑇 → (𝑡‘𝑥) = (𝑇‘𝑥)) | |
| 3 | 1, 2 | oveq12d 7432 | . . . . . . . 8 ⊢ (𝑡 = 𝑇 → ((𝑡‘𝑤) − (𝑡‘𝑥)) = ((𝑇‘𝑤) − (𝑇‘𝑥))) |
| 4 | 3 | fveq2d 6883 | . . . . . . 7 ⊢ (𝑡 = 𝑇 → (abs‘((𝑡‘𝑤) − (𝑡‘𝑥))) = (abs‘((𝑇‘𝑤) − (𝑇‘𝑥)))) |
| 5 | 4 | breq1d 5113 | . . . . . 6 ⊢ (𝑡 = 𝑇 → ((abs‘((𝑡‘𝑤) − (𝑡‘𝑥))) < 𝑦 ↔ (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦)) |
| 6 | 5 | imbi2d 343 | . . . . 5 ⊢ (𝑡 = 𝑇 → (((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑡‘𝑤) − (𝑡‘𝑥))) < 𝑦) ↔ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦))) |
| 7 | 6 | rexralbidv 3228 | . . . 4 ⊢ (𝑡 = 𝑇 → (∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑡‘𝑤) − (𝑡‘𝑥))) < 𝑦) ↔ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦))) |
| 8 | 7 | 2ralbidv 3226 | . . 3 ⊢ (𝑡 = 𝑇 → (∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑡‘𝑤) − (𝑡‘𝑥))) < 𝑦) ↔ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦))) |
| 9 | df-cnfn 32329 | . . 3 ⊢ ContFn = {𝑡 ∈ (ℂ ↑m ℋ) ∣ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑡‘𝑤) − (𝑡‘𝑥))) < 𝑦)} | |
| 10 | 8, 9 | elrab2 3649 | . 2 ⊢ (𝑇 ∈ ContFn ↔ (𝑇 ∈ (ℂ ↑m ℋ) ∧ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦))) |
| 11 | cnex 11206 | . . . 4 ⊢ ℂ ∈ V | |
| 12 | ax-hilex 31481 | . . . 4 ⊢ ℋ ∈ V | |
| 13 | 11, 12 | elmap 8879 | . . 3 ⊢ (𝑇 ∈ (ℂ ↑m ℋ) ↔ 𝑇: ℋ⟶ℂ) |
| 14 | 13 | anbi1i 636 | . 2 ⊢ ((𝑇 ∈ (ℂ ↑m ℋ) ∧ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦)) ↔ (𝑇: ℋ⟶ℂ ∧ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦))) |
| 15 | 10, 14 | bitri 278 | 1 ⊢ (𝑇 ∈ ContFn ↔ (𝑇: ℋ⟶ℂ ∧ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑤 ∈ ℋ ((normℎ‘(𝑤 −ℎ 𝑥)) < 𝑧 → (abs‘((𝑇‘𝑤) − (𝑇‘𝑥))) < 𝑦))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3076 ∃wrex 3086 class class class wbr 5103 ⟶wf 6529 ‘cfv 6533 (class class class)co 7414 ↑m cmap 8827 ℂcc 11123 < clt 11268 − cmin 11466 ℝ+crp 13043 abscabs 15322 ℋchba 31401 normℎcno 31405 −ℎ cmv 31407 ContFnccnfn 31435 |
| 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 2213 ax-ext 2732 ax-sep 5251 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-hilex 31481 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3740 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-fv 6541 df-ov 7417 df-oprab 7418 df-mpo 7419 df-map 8829 df-cnfn 32329 |
| This theorem is used by: cnfnc 32412 0cnfn 32462 lnfnconi 32537 |
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