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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 3992 | . . 3 ⊢ (ran 𝐹 = 𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | 1 | anim2i 617 | . 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 292 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ⊆ wss 3901 ran crn 5625 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 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-9 2123 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1781 df-cleq 2728 df-ss 3918 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 7016 fompt 7063 fconst5 7152 cocan2 7238 foeqcnvco 7246 soisoi 7274 ffoss 7890 focdmex 7900 opco1 8065 opco2 8066 tposf2 8192 smoiso2 8301 mapfoss 8789 ssdomg 8937 fopwdom 9013 unfilem2 9206 fodomfib 9229 fodomfibOLD 9231 fofinf1o 9232 brwdomn0 9474 fowdom 9476 wdomtr 9480 wdomima2g 9491 fodomfi2 9970 wdomfil 9971 alephiso 10008 iunfictbso 10024 cofsmo 10179 isf32lem10 10272 fin1a2lem7 10316 fodomb 10436 iunfo 10449 tskuni 10694 gruima 10713 gruen 10723 axpre-sup 11080 wrdsymb 14465 supcvg 15779 ruclem13 16167 imasval 17432 imasle 17444 imasaddfnlem 17449 imasaddflem 17451 imasvscafn 17458 imasvscaf 17460 imasless 17461 homadm 17964 homacd 17965 dmaf 17973 cdaf 17974 setcepi 18012 imasmnd2 18699 sursubmefmnd 18821 imasgrp2 18985 mhmid 18993 mhmmnd 18994 mhmfmhm 18995 ghmgrp 18996 efgred2 19682 ghmfghm 19759 ghmcyg 19825 gsumval3 19836 gsumzoppg 19873 gsum2dlem2 19900 imasring 20266 znunit 21518 znrrg 21520 cygznlem2a 21522 cygznlem3 21524 cncmp 23336 cnconn 23366 1stcfb 23389 dfac14 23562 qtopval2 23640 qtopuni 23646 qtopid 23649 qtopcld 23657 qtopcn 23658 qtopeu 23660 qtophmeo 23761 elfm3 23894 ovoliunnul 25464 uniiccdif 25535 dchrzrhcl 27212 lgsdchrval 27321 rpvmasumlem 27454 dchrmusum2 27461 dchrvmasumlem3 27466 dchrisum0ff 27474 dchrisum0flblem1 27475 rpvmasum2 27479 dchrisum0re 27480 dchrisum0lem2a 27484 nodense 27660 bdaydm 27746 bdayon 27748 om2noseqlt 28295 om2noseqlt2 28296 om2noseqf1o 28297 noseqrdgfn 28302 bdayn0sf1o 28366 grpocl 30575 grporndm 30585 vafval 30678 smfval 30680 nvgf 30693 vsfval 30708 hhssabloilem 31336 pjhf 31783 elunop 31947 unopf1o 31991 cnvunop 31993 pjinvari 32266 foresf1o 32579 rabfodom 32580 iunrdx 32638 xppreima 32723 gsumpart 33146 imasmhm 33435 imasghm 33436 imasrhm 33437 qtophaus 33993 sigapildsys 34319 carsgclctunlem3 34477 mtyf 35746 poimirlem26 37843 poimirlem27 37844 volsupnfl 37862 cocanfo 37916 exidreslem 38074 rngosn3 38121 rngodm1dm2 38129 founiiun 45419 founiiun0 45430 issalnnd 46585 sge0fodjrnlem 46656 ismeannd 46707 caragenunicl 46764 fcores 47309 fcoresf1lem 47310 fcoresf1 47311 fcoresfo 47313 3f1oss1 47317 fargshiftfo 47684 uptr2 49462 |
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