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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 6487 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
2 | ffvelrn 6826 | . . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ 𝐵) | |
3 | 2 | ralrimiva 3149 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) |
4 | 1, 3 | jca 515 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)) |
5 | simpl 486 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → 𝐹 Fn 𝐴) | |
6 | fvelrnb 6701 | . . . . . 6 ⊢ (𝐹 Fn 𝐴 → (𝑦 ∈ ran 𝐹 ↔ ∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦)) | |
7 | 6 | biimpd 232 | . . . . 5 ⊢ (𝐹 Fn 𝐴 → (𝑦 ∈ ran 𝐹 → ∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦)) |
8 | nfra1 3183 | . . . . . 6 ⊢ Ⅎ𝑥∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 | |
9 | nfv 1915 | . . . . . 6 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐵 | |
10 | rsp 3170 | . . . . . . 7 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 → (𝑥 ∈ 𝐴 → (𝐹‘𝑥) ∈ 𝐵)) | |
11 | eleq1 2877 | . . . . . . . 8 ⊢ ((𝐹‘𝑥) = 𝑦 → ((𝐹‘𝑥) ∈ 𝐵 ↔ 𝑦 ∈ 𝐵)) | |
12 | 11 | biimpcd 252 | . . . . . . 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 3276 | . . . . 5 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵 → (∃𝑥 ∈ 𝐴 (𝐹‘𝑥) = 𝑦 → 𝑦 ∈ 𝐵)) |
15 | 7, 14 | sylan9 511 | . . . 4 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → (𝑦 ∈ ran 𝐹 → 𝑦 ∈ 𝐵)) |
16 | 15 | ssrdv 3921 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → ran 𝐹 ⊆ 𝐵) |
17 | df-f 6328 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
18 | 5, 16, 17 | sylanbrc 586 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵) → 𝐹:𝐴⟶𝐵) |
19 | 4, 18 | impbii 212 | 1 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1538 ∈ wcel 2111 ∀wral 3106 ∃wrex 3107 ⊆ wss 3881 ran crn 5520 Fn wfn 6319 ⟶wf 6320 ‘cfv 6324 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-fv 6332 |
This theorem is referenced by: ffnfvf 6860 fnfvrnss 6861 frnssb 6862 fmpt2d 6864 fconstfv 6952 ffnov 7257 seqomlem2 8070 elixpconst 8452 elixpsn 8484 unblem4 8757 ordtypelem4 8969 oismo 8988 cantnfvalf 9112 rankf 9207 alephon 9480 alephf1 9496 alephf1ALT 9514 alephfplem4 9518 cfsmolem 9681 infpssrlem3 9716 axcc4 9850 domtriomlem 9853 axdclem2 9931 pwfseqlem3 10071 gch3 10087 inar1 10186 peano5nni 11628 cnref1o 12372 seqf2 13385 hashkf 13688 iswrdsymb 13874 ccatrn 13934 shftf 14430 sqrtf 14715 isercoll2 15017 eff2 15444 reeff1 15465 1arith 16253 ramcl 16355 xpscf 16830 dmaf 17301 cdaf 17302 coapm 17323 odf 18657 gsumpt 19075 dprdff 19127 dprdfcntz 19130 dprdfadd 19135 dprdlub 19141 mgpf 19305 prdscrngd 19359 isabvd 19584 psgnghm 20269 frlmsslsp 20485 psrbagcon 20609 subrgmvrf 20702 mplbas2 20710 mvrf2 20731 kqf 22352 fmf 22550 tmdgsum2 22701 prdstmdd 22729 prdstgpd 22730 prdsxmslem2 23136 metdsre 23458 evth 23564 evthicc2 24064 ovolfsf 24075 ovolf 24086 vitalilem2 24213 vitalilem5 24216 0plef 24276 mbfi1fseqlem4 24322 xrge0f 24335 itg2addlem 24362 dvfre 24554 dvne0 24614 mdegxrf 24669 mtest 24999 psercn 25021 recosf1o 25127 logcn 25238 amgm 25576 emcllem7 25587 dchrfi 25839 dchr1re 25847 dchrisum0re 26097 padicabvf 26215 vtxdgfisf 27266 hlimf 29020 pjrni 29485 pjmf1 29499 2ndresdju 30411 reprinfz1 32003 reprdifc 32008 bnj149 32257 subfacp1lem3 32542 mrsubrn 32873 msrf 32902 mclsind 32930 neibastop2lem 33821 rrncmslem 35270 cdlemk56 38267 hbtlem7 40069 dgraaf 40091 deg1mhm 40151 elixpconstg 41725 elmapsnd 41833 unirnmap 41837 resincncf 42517 dvnprodlem1 42588 volioof 42629 voliooicof 42638 qndenserrnbllem 42936 subsaliuncllem 42997 fge0iccico 43009 elhoi 43181 ovnsubaddlem1 43209 hoiqssbllem3 43263 ovolval4lem1 43288 rrx2xpref1o 45132 |
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