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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 6889 | . . . . . . . . 9 ⊢ (𝑡 = 𝑇 → (𝑡‘𝑤) = (𝑇‘𝑤)) | |
| 2 | fveq1 6889 | . . . . . . . . 9 ⊢ (𝑡 = 𝑇 → (𝑡‘𝑥) = (𝑇‘𝑥)) | |
| 3 | 1, 2 | oveq12d 7442 | . . . . . . . 8 ⊢ (𝑡 = 𝑇 → ((𝑡‘𝑤) − (𝑡‘𝑥)) = ((𝑇‘𝑤) − (𝑇‘𝑥))) |
| 4 | 3 | fveq2d 6894 | . . . . . . 7 ⊢ (𝑡 = 𝑇 → (abs‘((𝑡‘𝑤) − (𝑡‘𝑥))) = (abs‘((𝑇‘𝑤) − (𝑇‘𝑥)))) |
| 5 | 4 | breq1d 5112 | . . . . . 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 32458 | . . 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 3648 | . 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 11288 | . . . 4 ⊢ ℂ ∈ V | |
| 12 | ax-hilex 31610 | . . . 4 ⊢ ℋ ∈ V | |
| 13 | 11, 12 | elmap 8907 | . . 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 1569 ∈ wcel 2144 ∀wral 3076 ∃wrex 3086 class class class wbr 5102 ⟶wf 6539 ‘cfv 6543 (class class class)co 7424 ↑m cmap 8855 ℂcc 11205 < clt 11350 − cmin 11548 ℝ+crp 13127 abscabs 15410 ℋchba 31530 normℎcno 31534 −ℎ cmv 31536 ContFnccnfn 31564 |
| 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 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-cnex 11263 ax-hilex 31610 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-fv 6551 df-ov 7427 df-oprab 7428 df-mpo 7429 df-map 8857 df-cnfn 32458 |
| This theorem is used by: cnfnc 32541 0cnfn 32591 lnfnconi 32666 |
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