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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 codomain 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 24885 | . . . . . 6 ⊢ (𝑓 ∈ (𝐴–cn→𝐵) → 𝑓:𝐴⟶𝐵) | |
| 2 | 1 | adantl 482 | . . . . 5 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝑓:𝐴⟶𝐵) |
| 3 | simpll 772 | . . . . 5 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝐵 ⊆ 𝐶) | |
| 4 | 2, 3 | fssd 6679 | . . . 4 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝑓:𝐴⟶𝐶) |
| 5 | cncfcdm 24890 | . . . . 5 ⊢ ((𝐶 ⊆ ℂ ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → (𝑓 ∈ (𝐴–cn→𝐶) ↔ 𝑓:𝐴⟶𝐶)) | |
| 6 | 5 | adantll 720 | . . . 4 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → (𝑓 ∈ (𝐴–cn→𝐶) ↔ 𝑓:𝐴⟶𝐶)) |
| 7 | 4, 6 | mpbird 258 | . . 3 ⊢ (((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) ∧ 𝑓 ∈ (𝐴–cn→𝐵)) → 𝑓 ∈ (𝐴–cn→𝐶)) |
| 8 | 7 | ex 413 | . 2 ⊢ ((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) → (𝑓 ∈ (𝐴–cn→𝐵) → 𝑓 ∈ (𝐴–cn→𝐶))) |
| 9 | 8 | ssrdv 3928 | 1 ⊢ ((𝐵 ⊆ 𝐶 ∧ 𝐶 ⊆ ℂ) → (𝐴–cn→𝐵) ⊆ (𝐴–cn→𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 ∈ wcel 2119 ⊆ wss 3890 ⟶wf 6488 (class class class)co 7363 ℂcc 11034 –cn→ccncf 24868 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-cnex 11092 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-mulcom 11100 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 ax-pre-mulgt0 11113 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-iun 4930 df-br 5080 df-opab 5142 df-mpt 5161 df-tr 5187 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-om 7814 df-2nd 7939 df-frecs 8228 df-wrecs 8259 df-recs 8308 df-rdg 8346 df-er 8640 df-map 8772 df-en 8891 df-dom 8892 df-sdom 8893 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-sub 11377 df-neg 11378 df-div 11806 df-nn 12173 df-2 12242 df-cj 15059 df-re 15060 df-im 15061 df-abs 15196 df-cncf 24870 |
| This theorem is referenced by: cncfcompt2 24900 cncfmptid 24905 cncfmpt2ss 24908 evthicc2 25452 volivth 25599 iblabslem 25820 iblabs 25821 bddmulibl 25831 cnlimci 25881 rolle 25982 c1liplem1 25988 dvivth 26002 dvcnvrelem2 26010 itgsubst 26041 logcn 26636 logccv 26652 fdvposlt 34790 fdvneggt 34791 fdvposle 34792 fdvnegge 34793 logdivsqrle 34841 knoppcnlem10 36815 ftc1cnnclem 38065 ftc2nc 38076 areacirclem2 38083 evthiccabs 45948 cncfcompt 46333 cncficcgt0 46338 cncfiooicc 46344 cncfiooiccre 46345 itgsubsticclem 46425 fourierdlem72 46628 fourierdlem78 46634 fourierdlem83 46639 fourierdlem84 46640 fourierdlem85 46641 fourierdlem88 46644 fourierdlem95 46651 fourierdlem111 46667 |
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