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Mirrors > Home > MPE Home > Th. List > ffnfv | Structured version Visualization version GIF version |
Description: A function maps to a class to which all values belong. (Contributed by NM, 3-Dec-2003.) |
Ref | Expression |
---|---|
ffnfv | ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ffn 6584 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
2 | ffvelrn 6941 | . . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ 𝐵) | |
3 | 2 | ralrimiva 3107 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) |
4 | 1, 3 | jca 511 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)) |
5 | simpl 482 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → 𝐹 Fn 𝐴) | |
6 | fvelrnb 6812 | . . . . . 6 ⊢ (𝐹 Fn 𝐴 → (𝑦 ∈ ran 𝐹 ↔ ∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦)) | |
7 | 6 | biimpd 228 | . . . . 5 ⊢ (𝐹 Fn 𝐴 → (𝑦 ∈ ran 𝐹 → ∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦)) |
8 | nfra1 3142 | . . . . . 6 ⊢ Ⅎ𝑥∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 | |
9 | nfv 1918 | . . . . . 6 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐵 | |
10 | rsp 3129 | . . . . . . 7 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 → (𝑥 ∈ 𝐴 → (𝐹‘𝑥) ∈ 𝐵)) | |
11 | eleq1 2826 | . . . . . . . 8 ⊢ ((𝐹‘𝑥) = 𝑦 → ((𝐹‘𝑥) ∈ 𝐵 ↔ 𝑦 ∈ 𝐵)) | |
12 | 11 | biimpcd 248 | . . . . . . 7 ⊢ ((𝐹‘𝑥) ∈ 𝐵 → ((𝐹‘𝑥) = 𝑦 → 𝑦 ∈ 𝐵)) |
13 | 10, 12 | syl6 35 | . . . . . 6 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 → (𝑥 ∈ 𝐴 → ((𝐹‘𝑥) = 𝑦 → 𝑦 ∈ 𝐵))) |
14 | 8, 9, 13 | rexlimd 3245 | . . . . 5 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 → (∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦 → 𝑦 ∈ 𝐵)) |
15 | 7, 14 | sylan9 507 | . . . 4 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → (𝑦 ∈ ran 𝐹 → 𝑦 ∈ 𝐵)) |
16 | 15 | ssrdv 3923 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → ran 𝐹 ⊆ 𝐵) |
17 | df-f 6422 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
18 | 5, 16, 17 | sylanbrc 582 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → 𝐹:𝐴⟶𝐵) |
19 | 4, 18 | impbii 208 | 1 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ∀wral 3063 ∃wrex 3064 ⊆ wss 3883 ran crn 5581 Fn wfn 6413 ⟶wf 6414 ‘cfv 6418 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-fv 6426 |
This theorem is referenced by: ffnfvf 6975 fnfvrnss 6976 frnssb 6977 fmpt2d 6979 fconstfv 7070 ffnov 7379 seqomlem2 8252 elixpconst 8651 elixpsn 8683 unblem4 8999 ordtypelem4 9210 oismo 9229 cantnfvalf 9353 rankf 9483 alephon 9756 alephf1 9772 alephf1ALT 9790 alephfplem4 9794 cfsmolem 9957 infpssrlem3 9992 axcc4 10126 domtriomlem 10129 pwfseqlem3 10347 gch3 10363 inar1 10462 peano5nni 11906 cnref1o 12654 seqf2 13670 hashkf 13974 iswrdsymb 14162 ccatrn 14222 shftf 14718 sqrtf 15003 isercoll2 15308 eff2 15736 reeff1 15757 1arith 16556 ramcl 16658 xpscf 17193 dmaf 17680 cdaf 17681 coapm 17702 odf 19060 gsumpt 19478 dprdff 19530 dprdfcntz 19533 dprdfadd 19538 dprdlub 19544 mgpf 19713 prdscrngd 19767 isabvd 19995 psgnghm 20697 frlmsslsp 20913 psrbagcon 21043 psrbagconOLD 21044 subrgmvrf 21145 mplbas2 21153 mvrf2 21178 kqf 22806 fmf 23004 tmdgsum2 23155 prdstmdd 23183 prdstgpd 23184 prdsxmslem2 23591 metdsre 23922 evth 24028 evthicc2 24529 ovolfsf 24540 ovolf 24551 vitalilem2 24678 vitalilem5 24681 0plef 24741 mbfi1fseqlem4 24788 xrge0f 24801 itg2addlem 24828 dvfre 25020 dvne0 25080 mdegxrf 25138 mtest 25468 psercn 25490 recosf1o 25596 logcn 25707 amgm 26045 emcllem7 26056 dchrfi 26308 dchr1re 26316 dchrisum0re 26566 padicabvf 26684 vtxdgfisf 27746 hlimf 29500 pjrni 29965 pjmf1 29979 2ndresdju 30887 nsgmgc 31499 reprinfz1 32502 reprdifc 32507 bnj149 32755 subfacp1lem3 33044 mrsubrn 33375 msrf 33404 mclsind 33432 neibastop2lem 34476 rrncmslem 35917 cdlemk56 38912 sticksstones22 40052 hbtlem7 40866 dgraaf 40888 deg1mhm 40948 elixpconstg 42528 elmapsnd 42633 unirnmap 42637 resincncf 43306 dvnprodlem1 43377 volioof 43418 voliooicof 43427 qndenserrnbllem 43725 subsaliuncllem 43786 fge0iccico 43798 elhoi 43970 ovnsubaddlem1 43998 hoiqssbllem3 44052 ovolval4lem1 44077 rrx2xpref1o 45952 |
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