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Mirrors > Home > MPE Home > Th. List > Mathboxes > cncfmptssg | Structured version Visualization version GIF version |
Description: A continuous complex function restricted to a subset is continuous, using maps-to notation. This theorem generalizes cncfmptss 41305 because it allows to establish a subset for the codomain also. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
Ref | Expression |
---|---|
cncfmptssg.2 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐸) |
cncfmptssg.3 | ⊢ (𝜑 → 𝐹 ∈ (𝐴–cn→𝐵)) |
cncfmptssg.4 | ⊢ (𝜑 → 𝐶 ⊆ 𝐴) |
cncfmptssg.5 | ⊢ (𝜑 → 𝐷 ⊆ 𝐵) |
cncfmptssg.6 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐶) → 𝐸 ∈ 𝐷) |
Ref | Expression |
---|---|
cncfmptssg | ⊢ (𝜑 → (𝑥 ∈ 𝐶 ↦ 𝐸) ∈ (𝐶–cn→𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cncfmptssg.6 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐶) → 𝐸 ∈ 𝐷) | |
2 | 1 | fmpttd 6702 | . 2 ⊢ (𝜑 → (𝑥 ∈ 𝐶 ↦ 𝐸):𝐶⟶𝐷) |
3 | cncfmptssg.5 | . . . 4 ⊢ (𝜑 → 𝐷 ⊆ 𝐵) | |
4 | cncfmptssg.3 | . . . . 5 ⊢ (𝜑 → 𝐹 ∈ (𝐴–cn→𝐵)) | |
5 | cncfrss2 23203 | . . . . 5 ⊢ (𝐹 ∈ (𝐴–cn→𝐵) → 𝐵 ⊆ ℂ) | |
6 | 4, 5 | syl 17 | . . . 4 ⊢ (𝜑 → 𝐵 ⊆ ℂ) |
7 | 3, 6 | sstrd 3868 | . . 3 ⊢ (𝜑 → 𝐷 ⊆ ℂ) |
8 | cncfmptssg.4 | . . . . . . 7 ⊢ (𝜑 → 𝐶 ⊆ 𝐴) | |
9 | 8 | sselda 3858 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐶) → 𝑥 ∈ 𝐴) |
10 | cncfmptssg.2 | . . . . . . 7 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐸) | |
11 | 10 | fvmpt2 6605 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐸 ∈ 𝐷) → (𝐹‘𝑥) = 𝐸) |
12 | 9, 1, 11 | syl2anc 576 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐶) → (𝐹‘𝑥) = 𝐸) |
13 | 12 | mpteq2dva 5022 | . . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐶 ↦ (𝐹‘𝑥)) = (𝑥 ∈ 𝐶 ↦ 𝐸)) |
14 | nfmpt1 5025 | . . . . . 6 ⊢ Ⅎ𝑥(𝑥 ∈ 𝐴 ↦ 𝐸) | |
15 | 10, 14 | nfcxfr 2930 | . . . . 5 ⊢ Ⅎ𝑥𝐹 |
16 | 15, 4, 8 | cncfmptss 41305 | . . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐶 ↦ (𝐹‘𝑥)) ∈ (𝐶–cn→𝐵)) |
17 | 13, 16 | eqeltrrd 2867 | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐶 ↦ 𝐸) ∈ (𝐶–cn→𝐵)) |
18 | cncffvrn 23209 | . . 3 ⊢ ((𝐷 ⊆ ℂ ∧ (𝑥 ∈ 𝐶 ↦ 𝐸) ∈ (𝐶–cn→𝐵)) → ((𝑥 ∈ 𝐶 ↦ 𝐸) ∈ (𝐶–cn→𝐷) ↔ (𝑥 ∈ 𝐶 ↦ 𝐸):𝐶⟶𝐷)) | |
19 | 7, 17, 18 | syl2anc 576 | . 2 ⊢ (𝜑 → ((𝑥 ∈ 𝐶 ↦ 𝐸) ∈ (𝐶–cn→𝐷) ↔ (𝑥 ∈ 𝐶 ↦ 𝐸):𝐶⟶𝐷)) |
20 | 2, 19 | mpbird 249 | 1 ⊢ (𝜑 → (𝑥 ∈ 𝐶 ↦ 𝐸) ∈ (𝐶–cn→𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 198 ∧ wa 387 = wceq 1507 ∈ wcel 2050 ⊆ wss 3829 ↦ cmpt 5008 ⟶wf 6184 ‘cfv 6188 (class class class)co 6976 ℂcc 10333 –cn→ccncf 23187 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1758 ax-4 1772 ax-5 1869 ax-6 1928 ax-7 1965 ax-8 2052 ax-9 2059 ax-10 2079 ax-11 2093 ax-12 2106 ax-13 2301 ax-ext 2750 ax-sep 5060 ax-nul 5067 ax-pow 5119 ax-pr 5186 ax-un 7279 ax-cnex 10391 ax-resscn 10392 ax-1cn 10393 ax-icn 10394 ax-addcl 10395 ax-addrcl 10396 ax-mulcl 10397 ax-mulrcl 10398 ax-mulcom 10399 ax-addass 10400 ax-mulass 10401 ax-distr 10402 ax-i2m1 10403 ax-1ne0 10404 ax-1rid 10405 ax-rnegex 10406 ax-rrecex 10407 ax-cnre 10408 ax-pre-lttri 10409 ax-pre-lttrn 10410 ax-pre-ltadd 10411 ax-pre-mulgt0 10412 |
This theorem depends on definitions: df-bi 199 df-an 388 df-or 834 df-3or 1069 df-3an 1070 df-tru 1510 df-ex 1743 df-nf 1747 df-sb 2016 df-mo 2547 df-eu 2584 df-clab 2759 df-cleq 2771 df-clel 2846 df-nfc 2918 df-ne 2968 df-nel 3074 df-ral 3093 df-rex 3094 df-reu 3095 df-rmo 3096 df-rab 3097 df-v 3417 df-sbc 3682 df-csb 3787 df-dif 3832 df-un 3834 df-in 3836 df-ss 3843 df-nul 4179 df-if 4351 df-pw 4424 df-sn 4442 df-pr 4444 df-op 4448 df-uni 4713 df-br 4930 df-opab 4992 df-mpt 5009 df-id 5312 df-po 5326 df-so 5327 df-xp 5413 df-rel 5414 df-cnv 5415 df-co 5416 df-dm 5417 df-rn 5418 df-res 5419 df-ima 5420 df-iota 6152 df-fun 6190 df-fn 6191 df-f 6192 df-f1 6193 df-fo 6194 df-f1o 6195 df-fv 6196 df-riota 6937 df-ov 6979 df-oprab 6980 df-mpo 6981 df-er 8089 df-map 8208 df-en 8307 df-dom 8308 df-sdom 8309 df-pnf 10476 df-mnf 10477 df-xr 10478 df-ltxr 10479 df-le 10480 df-sub 10672 df-neg 10673 df-div 11099 df-2 11503 df-cj 14319 df-re 14320 df-im 14321 df-abs 14456 df-cncf 23189 |
This theorem is referenced by: negcncfg 41600 itgsinexplem1 41675 itgiccshift 41701 itgperiod 41702 itgsbtaddcnst 41703 dirkeritg 41824 dirkercncflem2 41826 dirkercncflem4 41828 fourierdlem18 41847 fourierdlem23 41852 fourierdlem39 41868 fourierdlem40 41869 fourierdlem62 41890 fourierdlem73 41901 fourierdlem78 41906 fourierdlem83 41911 fourierdlem84 41912 fourierdlem93 41921 fourierdlem95 41923 fourierdlem101 41929 fourierdlem111 41939 etransclem46 42002 |
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