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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 6509 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
2 | ffvelrn 6844 | . . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ 𝐵) | |
3 | 2 | ralrimiva 3182 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) |
4 | 1, 3 | jca 514 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)) |
5 | simpl 485 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → 𝐹 Fn 𝐴) | |
6 | fvelrnb 6721 | . . . . . 6 ⊢ (𝐹 Fn 𝐴 → (𝑦 ∈ ran 𝐹 ↔ ∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦)) | |
7 | 6 | biimpd 231 | . . . . 5 ⊢ (𝐹 Fn 𝐴 → (𝑦 ∈ ran 𝐹 → ∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦)) |
8 | nfra1 3219 | . . . . . 6 ⊢ Ⅎ𝑥∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 | |
9 | nfv 1911 | . . . . . 6 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐵 | |
10 | rsp 3205 | . . . . . . 7 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 → (𝑥 ∈ 𝐴 → (𝐹‘𝑥) ∈ 𝐵)) | |
11 | eleq1 2900 | . . . . . . . 8 ⊢ ((𝐹‘𝑥) = 𝑦 → ((𝐹‘𝑥) ∈ 𝐵 ↔ 𝑦 ∈ 𝐵)) | |
12 | 11 | biimpcd 251 | . . . . . . 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 3317 | . . . . 5 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 → (∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦 → 𝑦 ∈ 𝐵)) |
15 | 7, 14 | sylan9 510 | . . . 4 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → (𝑦 ∈ ran 𝐹 → 𝑦 ∈ 𝐵)) |
16 | 15 | ssrdv 3973 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → ran 𝐹 ⊆ 𝐵) |
17 | df-f 6354 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
18 | 5, 16, 17 | sylanbrc 585 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → 𝐹:𝐴⟶𝐵) |
19 | 4, 18 | impbii 211 | 1 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1533 ∈ wcel 2110 ∀wral 3138 ∃wrex 3139 ⊆ wss 3936 ran crn 5551 Fn wfn 6345 ⟶wf 6346 ‘cfv 6350 |
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-pr 5322 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 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-ral 3143 df-rex 3144 df-rab 3147 df-v 3497 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 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-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-fv 6358 |
This theorem is referenced by: ffnfvf 6878 fnfvrnss 6879 frnssb 6880 fmpt2d 6882 fconstfv 6969 ffnov 7272 seqomlem2 8081 elixpconst 8463 elixpsn 8495 unblem4 8767 ordtypelem4 8979 oismo 8998 cantnfvalf 9122 rankf 9217 alephon 9489 alephf1 9505 alephf1ALT 9523 alephfplem4 9527 cfsmolem 9686 infpssrlem3 9721 axcc4 9855 domtriomlem 9858 axdclem2 9936 pwfseqlem3 10076 gch3 10092 inar1 10191 peano5nni 11635 cnref1o 12378 seqf2 13383 hashkf 13686 iswrdsymb 13875 ccatrn 13937 shftf 14432 sqrtf 14717 isercoll2 15019 eff2 15446 reeff1 15467 1arith 16257 ramcl 16359 xpscf 16832 dmaf 17303 cdaf 17304 coapm 17325 odf 18659 gsumpt 19076 dprdff 19128 dprdfcntz 19131 dprdfadd 19136 dprdlub 19142 mgpf 19303 prdscrngd 19357 isabvd 19585 psrbagcon 20145 subrgmvrf 20237 mplbas2 20245 mvrf2 20266 psgnghm 20718 frlmsslsp 20934 kqf 22349 fmf 22547 tmdgsum2 22698 prdstmdd 22726 prdstgpd 22727 prdsxmslem2 23133 metdsre 23455 evth 23557 evthicc2 24055 ovolfsf 24066 ovolf 24077 vitalilem2 24204 vitalilem5 24207 0plef 24267 mbfi1fseqlem4 24313 xrge0f 24326 itg2addlem 24353 dvfre 24542 dvne0 24602 mdegxrf 24656 mtest 24986 psercn 25008 recosf1o 25113 logcn 25224 amgm 25562 emcllem7 25573 dchrfi 25825 dchr1re 25833 dchrisum0re 26083 padicabvf 26201 vtxdgfisf 27252 hlimf 29008 pjrni 29473 pjmf1 29487 reprinfz1 31888 reprdifc 31893 bnj149 32142 subfacp1lem3 32424 mrsubrn 32755 msrf 32784 mclsind 32812 neibastop2lem 33703 rrncmslem 35104 cdlemk56 38101 hbtlem7 39718 dgraaf 39740 deg1mhm 39800 elixpconstg 41348 elmapsnd 41459 unirnmap 41463 resincncf 42150 dvnprodlem1 42223 volioof 42265 voliooicof 42274 qndenserrnbllem 42572 subsaliuncllem 42633 fge0iccico 42645 elhoi 42817 ovnsubaddlem1 42845 hoiqssbllem3 42899 ovolval4lem1 42924 rrx2xpref1o 44698 |
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