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Mirrors > Home > MPE Home > Th. List > cncfss | Structured version Visualization version GIF version |
Description: The set of continuous functions is expanded when the range is expanded. (Contributed by Mario Carneiro, 30-Aug-2014.) |
Ref | Expression |
---|---|
cncfss | ⊢ ((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) → (𝐴–cn→𝐵) ⊆ (𝐴–cn→𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cncff 23584 | . . . . . 6 ⊢ (𝑓 ∈ (𝐴–cn→𝐵) → 𝑓:𝐴⟶𝐵) | |
2 | 1 | adantl 486 | . . . . 5 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝑓:𝐴⟶𝐵) |
3 | simpll 767 | . . . . 5 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝐵 ⊆ 𝐶) | |
4 | 2, 3 | fssd 6511 | . . . 4 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝑓:𝐴⟶𝐶) |
5 | cncffvrn 23589 | . . . . 5 ⊢ ((𝐶 ⊆ ℂ ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → (𝑓 ∈ (𝐴–cn→𝐶) ↔ 𝑓:𝐴⟶𝐶)) | |
6 | 5 | adantll 714 | . . . 4 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → (𝑓 ∈ (𝐴–cn→𝐶) ↔ 𝑓:𝐴⟶𝐶)) |
7 | 4, 6 | mpbird 260 | . . 3 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝑓 ∈ (𝐴–cn→𝐶)) |
8 | 7 | ex 417 | . 2 ⊢ ((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) → (𝑓 ∈ (𝐴–cn→𝐵) → 𝑓 ∈ (𝐴–cn→𝐶))) |
9 | 8 | ssrdv 3899 | 1 ⊢ ((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) → (𝐴–cn→𝐵) ⊆ (𝐴–cn→𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∈ wcel 2112 ⊆ wss 3859 ⟶wf 6329 (class class class)co 7148 ℂcc 10563 –cn→ccncf 23567 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1912 ax-6 1971 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2159 ax-12 2176 ax-ext 2730 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7457 ax-cnex 10621 ax-resscn 10622 ax-1cn 10623 ax-icn 10624 ax-addcl 10625 ax-addrcl 10626 ax-mulcl 10627 ax-mulrcl 10628 ax-mulcom 10629 ax-addass 10630 ax-mulass 10631 ax-distr 10632 ax-i2m1 10633 ax-1ne0 10634 ax-1rid 10635 ax-rnegex 10636 ax-rrecex 10637 ax-cnre 10638 ax-pre-lttri 10639 ax-pre-lttrn 10640 ax-pre-ltadd 10641 ax-pre-mulgt0 10642 |
This theorem depends on definitions: df-bi 210 df-an 401 df-or 846 df-3or 1086 df-3an 1087 df-tru 1542 df-ex 1783 df-nf 1787 df-sb 2071 df-mo 2558 df-eu 2589 df-clab 2737 df-cleq 2751 df-clel 2831 df-nfc 2902 df-ne 2953 df-nel 3057 df-ral 3076 df-rex 3077 df-reu 3078 df-rmo 3079 df-rab 3080 df-v 3412 df-sbc 3698 df-csb 3807 df-dif 3862 df-un 3864 df-in 3866 df-ss 3876 df-nul 4227 df-if 4419 df-pw 4494 df-sn 4521 df-pr 4523 df-op 4527 df-uni 4797 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5428 df-po 5441 df-so 5442 df-xp 5528 df-rel 5529 df-cnv 5530 df-co 5531 df-dm 5532 df-rn 5533 df-res 5534 df-ima 5535 df-iota 6292 df-fun 6335 df-fn 6336 df-f 6337 df-f1 6338 df-fo 6339 df-f1o 6340 df-fv 6341 df-riota 7106 df-ov 7151 df-oprab 7152 df-mpo 7153 df-er 8297 df-map 8416 df-en 8526 df-dom 8527 df-sdom 8528 df-pnf 10705 df-mnf 10706 df-xr 10707 df-ltxr 10708 df-le 10709 df-sub 10900 df-neg 10901 df-div 11326 df-2 11727 df-cj 14496 df-re 14497 df-im 14498 df-abs 14633 df-cncf 23569 |
This theorem is referenced by: cncfcompt2 23599 cncfmptid 23604 cncfmpt2ss 23607 evthicc2 24150 volivth 24297 iblabslem 24517 iblabs 24518 bddmulibl 24528 cnlimci 24578 rolle 24679 c1liplem1 24685 dvivth 24699 dvcnvrelem2 24707 itgsubst 24738 logcn 25327 logccv 25343 fdvposlt 32088 fdvneggt 32089 fdvposle 32090 fdvnegge 32091 logdivsqrle 32139 knoppcnlem10 34221 ftc1cnnclem 35398 ftc2nc 35409 areacirclem2 35416 evthiccabs 42489 cncfcompt 42881 cncficcgt0 42886 cncfiooicc 42892 cncfiooiccre 42893 itgsubsticclem 42973 fourierdlem72 43176 fourierdlem78 43182 fourierdlem83 43187 fourierdlem84 43188 fourierdlem85 43189 fourierdlem88 43192 fourierdlem95 43199 fourierdlem111 43215 |
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