Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > cncfcompt2 | Structured version Visualization version GIF version |
Description: Composition of continuous functions. (Contributed by Glauco Siliprandi, 5-Apr-2020.) |
Ref | Expression |
---|---|
cncfcompt2.xph | ⊢ Ⅎ𝑥𝜑 |
cncfcompt2.ab | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑅) ∈ (𝐴–cn→𝐵)) |
cncfcompt2.cd | ⊢ (𝜑 → (𝑦 ∈ 𝐶 ↦ 𝑆) ∈ (𝐶–cn→𝐸)) |
cncfcompt2.bc | ⊢ (𝜑 → 𝐵 ⊆ 𝐶) |
cncfcompt2.st | ⊢ (𝑦 = 𝑅 → 𝑆 = 𝑇) |
Ref | Expression |
---|---|
cncfcompt2 | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑇) ∈ (𝐴–cn→𝐸)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cncfcompt2.xph | . . . . 5 ⊢ Ⅎ𝑥𝜑 | |
2 | cncfcompt2.bc | . . . . . . . 8 ⊢ (𝜑 → 𝐵 ⊆ 𝐶) | |
3 | 2 | adantr 483 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ⊆ 𝐶) |
4 | cncfcompt2.ab | . . . . . . . . 9 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑅) ∈ (𝐴–cn→𝐵)) | |
5 | cncff 23495 | . . . . . . . . 9 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝑅) ∈ (𝐴–cn→𝐵) → (𝑥 ∈ 𝐴 ↦ 𝑅):𝐴⟶𝐵) | |
6 | 4, 5 | syl 17 | . . . . . . . 8 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑅):𝐴⟶𝐵) |
7 | 6 | fvmptelrn 6872 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑅 ∈ 𝐵) |
8 | 3, 7 | sseldd 3968 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑅 ∈ 𝐶) |
9 | 8 | ex 415 | . . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝐴 → 𝑅 ∈ 𝐶)) |
10 | 1, 9 | ralrimi 3216 | . . . 4 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 𝑅 ∈ 𝐶) |
11 | eqidd 2822 | . . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑅) = (𝑥 ∈ 𝐴 ↦ 𝑅)) | |
12 | eqidd 2822 | . . . 4 ⊢ (𝜑 → (𝑦 ∈ 𝐶 ↦ 𝑆) = (𝑦 ∈ 𝐶 ↦ 𝑆)) | |
13 | cncfcompt2.st | . . . 4 ⊢ (𝑦 = 𝑅 → 𝑆 = 𝑇) | |
14 | 10, 11, 12, 13 | fmptcof 6887 | . . 3 ⊢ (𝜑 → ((𝑦 ∈ 𝐶 ↦ 𝑆) ∘ (𝑥 ∈ 𝐴 ↦ 𝑅)) = (𝑥 ∈ 𝐴 ↦ 𝑇)) |
15 | 14 | eqcomd 2827 | . 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑇) = ((𝑦 ∈ 𝐶 ↦ 𝑆) ∘ (𝑥 ∈ 𝐴 ↦ 𝑅))) |
16 | cncfcompt2.cd | . . . . . 6 ⊢ (𝜑 → (𝑦 ∈ 𝐶 ↦ 𝑆) ∈ (𝐶–cn→𝐸)) | |
17 | cncfrss 23493 | . . . . . 6 ⊢ ((𝑦 ∈ 𝐶 ↦ 𝑆) ∈ (𝐶–cn→𝐸) → 𝐶 ⊆ ℂ) | |
18 | 16, 17 | syl 17 | . . . . 5 ⊢ (𝜑 → 𝐶 ⊆ ℂ) |
19 | cncfss 23501 | . . . . 5 ⊢ ((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) → (𝐴–cn→𝐵) ⊆ (𝐴–cn→𝐶)) | |
20 | 2, 18, 19 | syl2anc 586 | . . . 4 ⊢ (𝜑 → (𝐴–cn→𝐵) ⊆ (𝐴–cn→𝐶)) |
21 | 20, 4 | sseldd 3968 | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑅) ∈ (𝐴–cn→𝐶)) |
22 | 21, 16 | cncfco 23509 | . 2 ⊢ (𝜑 → ((𝑦 ∈ 𝐶 ↦ 𝑆) ∘ (𝑥 ∈ 𝐴 ↦ 𝑅)) ∈ (𝐴–cn→𝐸)) |
23 | 15, 22 | eqeltrd 2913 | 1 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝑇) ∈ (𝐴–cn→𝐸)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 Ⅎwnf 1780 ∈ wcel 2110 ⊆ wss 3936 ↦ cmpt 5139 ∘ ccom 5554 ⟶wf 6346 (class class class)co 7150 ℂcc 10529 –cn→ccncf 23478 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-cnex 10587 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4833 df-br 5060 df-opab 5122 df-mpt 5140 df-id 5455 df-po 5469 df-so 5470 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-fv 6358 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-er 8283 df-map 8402 df-en 8504 df-dom 8505 df-sdom 8506 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-div 11292 df-2 11694 df-cj 14452 df-re 14453 df-im 14454 df-abs 14589 df-cncf 23480 |
This theorem is referenced by: etransclem18 42530 etransclem22 42534 etransclem46 42558 |
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