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| Mirrors > Home > MPE Home > Th. List > fof | Structured version Visualization version GIF version | ||
| Description: An onto mapping is a mapping. (Contributed by NM, 3-Aug-1994.) |
| Ref | Expression |
|---|---|
| fof | ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqimss 3994 | . . 3 ⊢ (ran 𝐹 = 𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | 1 | anim2i 618 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| 3 | df-fo 6506 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵)) | |
| 4 | df-f 6504 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
| 5 | 2, 3, 4 | 3imtr4i 292 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ⊆ wss 3903 ran crn 5633 Fn wfn 6495 ⟶wf 6496 –onto→wfo 6498 |
| 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 1912 ax-6 1969 ax-7 2010 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2729 df-ss 3920 df-f 6504 df-fo 6506 |
| This theorem is referenced by: fofun 6755 fofn 6756 dffo2 6758 foima 6759 focnvimacdmdm 6766 focofo 6767 resdif 6803 fimacnvinrn 7025 fompt 7072 fconst5 7162 cocan2 7248 foeqcnvco 7256 soisoi 7284 ffoss 7900 focdmex 7910 opco1 8075 opco2 8076 tposf2 8202 smoiso2 8311 mapfoss 8801 ssdomg 8949 fopwdom 9025 unfilem2 9218 fodomfib 9241 fodomfibOLD 9243 fofinf1o 9244 brwdomn0 9486 fowdom 9488 wdomtr 9492 wdomima2g 9503 fodomfi2 9982 wdomfil 9983 alephiso 10020 iunfictbso 10036 cofsmo 10191 isf32lem10 10284 fin1a2lem7 10328 fodomb 10448 iunfo 10461 tskuni 10706 gruima 10725 gruen 10735 axpre-sup 11092 wrdsymb 14477 supcvg 15791 ruclem13 16179 imasval 17444 imasle 17456 imasaddfnlem 17461 imasaddflem 17463 imasvscafn 17470 imasvscaf 17472 imasless 17473 homadm 17976 homacd 17977 dmaf 17985 cdaf 17986 setcepi 18024 imasmnd2 18711 sursubmefmnd 18833 imasgrp2 18997 mhmid 19005 mhmmnd 19006 mhmfmhm 19007 ghmgrp 19008 efgred2 19694 ghmfghm 19771 ghmcyg 19837 gsumval3 19848 gsumzoppg 19885 gsum2dlem2 19912 imasring 20278 znunit 21530 znrrg 21532 cygznlem2a 21534 cygznlem3 21536 cncmp 23348 cnconn 23378 1stcfb 23401 dfac14 23574 qtopval2 23652 qtopuni 23658 qtopid 23661 qtopcld 23669 qtopcn 23670 qtopeu 23672 qtophmeo 23773 elfm3 23906 ovoliunnul 25476 uniiccdif 25547 dchrzrhcl 27224 lgsdchrval 27333 rpvmasumlem 27466 dchrmusum2 27473 dchrvmasumlem3 27478 dchrisum0ff 27486 dchrisum0flblem1 27487 rpvmasum2 27491 dchrisum0re 27492 dchrisum0lem2a 27496 nodense 27672 bdaydm 27758 bdayon 27760 om2noseqlt 28307 om2noseqlt2 28308 om2noseqf1o 28309 noseqrdgfn 28314 bdayn0sf1o 28378 grpocl 30587 grporndm 30597 vafval 30690 smfval 30692 nvgf 30705 vsfval 30720 hhssabloilem 31348 pjhf 31795 elunop 31959 unopf1o 32003 cnvunop 32005 pjinvari 32278 foresf1o 32590 rabfodom 32591 iunrdx 32649 xppreima 32734 gsumpart 33156 imasmhm 33446 imasghm 33447 imasrhm 33448 qtophaus 34013 sigapildsys 34339 carsgclctunlem3 34497 mtyf 35765 poimirlem26 37891 poimirlem27 37892 volsupnfl 37910 cocanfo 37964 exidreslem 38122 rngosn3 38169 rngodm1dm2 38177 founiiun 45532 founiiun0 45543 issalnnd 46697 sge0fodjrnlem 46768 ismeannd 46819 caragenunicl 46876 fcores 47421 fcoresf1lem 47422 fcoresf1 47423 fcoresfo 47425 3f1oss1 47429 fargshiftfo 47796 uptr2 49574 |
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