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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 3980 | . . 3 ⊢ (ran 𝐹 = 𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | 1 | anim2i 623 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| 3 | df-fo 6498 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵)) | |
| 4 | df-f 6496 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
| 5 | 2, 3, 4 | 3imtr4i 293 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ⊆ wss 3890 ran crn 5626 Fn wfn 6487 ⟶wf 6488 –onto→wfo 6490 |
| 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-9 2129 ax-ext 2712 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-ex 1787 df-cleq 2732 df-ss 3907 df-f 6496 df-fo 6498 |
| This theorem is referenced by: fofun 6747 fofn 6748 dffo2 6750 foima 6751 focnvimacdmdm 6758 focofo 6759 resdif 6795 fimacnvinrn 7019 fompt 7066 fconst5 7157 cocan2 7243 foeqcnvco 7251 soisoi 7279 ffoss 7895 focdmex 7905 opco1 8069 opco2 8070 tposf2 8197 smoiso2 8306 mapfoss 8796 ssdomg 8944 fopwdom 9020 unfilem2 9213 fodomfib 9236 fodomfibOLD 9238 fofinf1o 9239 brwdomn0 9481 fowdom 9483 wdomtr 9487 wdomima2g 9498 fodomfi2 9980 wdomfil 9981 alephiso 10018 iunfictbso 10034 cofsmo 10189 isf32lem10 10282 fin1a2lem7 10326 fodomb 10446 iunfo 10459 tskuni 10704 gruima 10723 gruen 10733 axpre-sup 11090 wrdsymb 14502 supcvg 15819 ruclem13 16207 imasval 17473 imasle 17485 imasaddfnlem 17490 imasaddflem 17492 imasvscafn 17499 imasvscaf 17501 imasless 17502 homadm 18005 homacd 18006 dmaf 18014 cdaf 18015 setcepi 18053 imasmnd2 18740 sursubmefmnd 18862 imasgrp2 19029 mhmid 19037 mhmmnd 19038 mhmfmhm 19039 ghmgrp 19040 efgred2 19726 ghmfghm 19803 ghmcyg 19869 gsumval3 19880 gsumzoppg 19917 gsum2dlem2 19944 imasring 20308 znunit 21545 znrrg 21547 cygznlem2a 21549 cygznlem3 21551 cncmp 23382 cnconn 23412 1stcfb 23435 dfac14 23608 qtopval2 23686 qtopuni 23692 qtopid 23695 qtopcld 23703 qtopcn 23704 qtopeu 23706 qtophmeo 23807 elfm3 23940 ovoliunnul 25499 uniiccdif 25570 dchrzrhcl 27233 lgsdchrval 27342 rpvmasumlem 27475 dchrmusum2 27482 dchrvmasumlem3 27487 dchrisum0ff 27495 dchrisum0flblem1 27496 rpvmasum2 27500 dchrisum0re 27501 dchrisum0lem2a 27505 nodense 27681 bdaydm 27767 bdayon 27769 om2noseqlt 28316 om2noseqlt2 28317 om2noseqf1o 28318 noseqrdgfn 28323 bdayn0sf1o 28387 grpocl 30596 grporndm 30606 vafval 30699 smfval 30701 nvgf 30714 vsfval 30729 hhssabloilem 31357 pjhf 31804 elunop 31968 unopf1o 32012 cnvunop 32014 pjinvari 32287 foresf1o 32599 rabfodom 32600 iunrdx 32659 xppreima 32744 gsumpart 33151 imasmhm 33444 imasghm 33445 imasrhm 33446 qtophaus 34027 sigapildsys 34353 carsgclctunlem3 34511 mtyf 35787 poimirlem26 38020 poimirlem27 38021 volsupnfl 38039 cocanfo 38093 exidreslem 38251 rngosn3 38298 rngodm1dm2 38306 founiiun 45633 founiiun0 45644 issalnnd 46795 sge0fodjrnlem 46866 ismeannd 46917 caragenunicl 46974 fcores 47537 fcoresf1lem 47538 fcoresf1 47539 fcoresfo 47541 3f1oss1 47545 fargshiftfo 47924 uptr2 49718 |
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