Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > cncfcompt | Structured version Visualization version GIF version |
Description: Composition of continuous functions. A generalization of cncfmpt1f 22716 to arbitrary domains. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
Ref | Expression |
---|---|
cncfcompt.bcn | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (𝐴–cn→𝐶)) |
cncfcompt.f | ⊢ (𝜑 → 𝐹 ∈ (𝐶–cn→𝐷)) |
Ref | Expression |
---|---|
cncfcompt | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) ∈ (𝐴–cn→𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cncfcompt.f | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (𝐶–cn→𝐷)) | |
2 | cncff 22696 | . . . . . 6 ⊢ (𝐹 ∈ (𝐶–cn→𝐷) → 𝐹:𝐶⟶𝐷) | |
3 | 1, 2 | syl 17 | . . . . 5 ⊢ (𝜑 → 𝐹:𝐶⟶𝐷) |
4 | 3 | adantr 481 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐹:𝐶⟶𝐷) |
5 | cncfcompt.bcn | . . . . . 6 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (𝐴–cn→𝐶)) | |
6 | cncff 22696 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (𝐴–cn→𝐶) → (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶𝐶) | |
7 | 5, 6 | syl 17 | . . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶𝐶) |
8 | 7 | mptex2 6384 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝐶) |
9 | 4, 8 | ffvelrnd 6360 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝐵) ∈ 𝐷) |
10 | eqid 2622 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) = (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) | |
11 | 9, 10 | fmptd 6385 | . 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)):𝐴⟶𝐷) |
12 | cncfrss2 22695 | . . . 4 ⊢ (𝐹 ∈ (𝐶–cn→𝐷) → 𝐷 ⊆ ℂ) | |
13 | 1, 12 | syl 17 | . . 3 ⊢ (𝜑 → 𝐷 ⊆ ℂ) |
14 | eqidd 2623 | . . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)) | |
15 | 3 | feqmptd 6249 | . . . . 5 ⊢ (𝜑 → 𝐹 = (𝑦 ∈ 𝐶 ↦ (𝐹‘𝑦))) |
16 | fveq2 6191 | . . . . 5 ⊢ (𝑦 = 𝐵 → (𝐹‘𝑦) = (𝐹‘𝐵)) | |
17 | 8, 14, 15, 16 | fmptco 6396 | . . . 4 ⊢ (𝜑 → (𝐹 ∘ (𝑥 ∈ 𝐴 ↦ 𝐵)) = (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵))) |
18 | ssid 3624 | . . . . . . 7 ⊢ ℂ ⊆ ℂ | |
19 | cncfss 22702 | . . . . . . 7 ⊢ ((𝐷 ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝐶–cn→𝐷) ⊆ (𝐶–cn→ℂ)) | |
20 | 13, 18, 19 | sylancl 694 | . . . . . 6 ⊢ (𝜑 → (𝐶–cn→𝐷) ⊆ (𝐶–cn→ℂ)) |
21 | 20, 1 | sseldd 3604 | . . . . 5 ⊢ (𝜑 → 𝐹 ∈ (𝐶–cn→ℂ)) |
22 | 5, 21 | cncfco 22710 | . . . 4 ⊢ (𝜑 → (𝐹 ∘ (𝑥 ∈ 𝐴 ↦ 𝐵)) ∈ (𝐴–cn→ℂ)) |
23 | 17, 22 | eqeltrrd 2702 | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) ∈ (𝐴–cn→ℂ)) |
24 | cncffvrn 22701 | . . 3 ⊢ ((𝐷 ⊆ ℂ ∧ (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) ∈ (𝐴–cn→ℂ)) → ((𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) ∈ (𝐴–cn→𝐷) ↔ (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)):𝐴⟶𝐷)) | |
25 | 13, 23, 24 | syl2anc 693 | . 2 ⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) ∈ (𝐴–cn→𝐷) ↔ (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)):𝐴⟶𝐷)) |
26 | 11, 25 | mpbird 247 | 1 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐹‘𝐵)) ∈ (𝐴–cn→𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 ∈ wcel 1990 ⊆ wss 3574 ↦ cmpt 4729 ∘ ccom 5118 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 ℂcc 9934 –cn→ccncf 22679 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-po 5035 df-so 5036 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-er 7742 df-map 7859 df-en 7956 df-dom 7957 df-sdom 7958 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-2 11079 df-cj 13839 df-re 13840 df-im 13841 df-abs 13976 df-cncf 22681 |
This theorem is referenced by: itgsbtaddcnst 40198 fourierdlem23 40347 fourierdlem83 40406 fourierdlem101 40424 |
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