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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 3974 | . . 3 ⊢ (ran 𝐹 = 𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | 1 | anim2i 624 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| 3 | df-fo 6494 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵)) | |
| 4 | df-f 6492 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
| 5 | 2, 3, 4 | 3imtr4i 294 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 397 = wceq 1548 ⊆ wss 3884 ran crn 5621 Fn wfn 6483 ⟶wf 6484 –onto→wfo 6486 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-9 2131 ax-ext 2713 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-ex 1788 df-cleq 2733 df-ss 3901 df-f 6492 df-fo 6494 |
| This theorem is referenced by: fofun 6743 fofn 6744 dffo2 6746 foima 6747 focnvimacdmdm 6754 focofo 6755 resdif 6791 fimacnvinrn 7015 fompt 7062 fconst5 7153 cocan2 7239 foeqcnvco 7247 soisoi 7275 ffoss 7890 focdmex 7900 opco1 8064 opco2 8065 tposf2 8192 smoiso2 8302 mapfoss 8793 ssdomg 8941 fopwdom 9017 unfilem2 9210 fodomfib 9233 fodomfibOLD 9235 fofinf1o 9236 brwdomn0 9478 fowdom 9480 wdomtr 9484 wdomima2g 9495 fodomfi2 9977 wdomfil 9978 alephiso 10015 iunfictbso 10031 cofsmo 10187 isf32lem10 10280 fin1a2lem7 10324 fodomb 10444 iunfo 10457 tskuni 10702 gruima 10721 gruen 10731 axpre-sup 11088 wrdsymb 14499 supcvg 15816 ruclem13 16204 imasval 17470 imasle 17482 imasaddfnlem 17487 imasaddflem 17489 imasvscafn 17496 imasvscaf 17498 imasless 17499 homadm 18002 homacd 18003 dmaf 18011 cdaf 18012 setcepi 18050 imasmnd2 18737 sursubmefmnd 18859 imasgrp2 19026 mhmid 19034 mhmmnd 19035 mhmfmhm 19036 ghmgrp 19037 efgred2 19722 ghmfghm 19799 ghmcyg 19865 gsumval3 19876 gsumzoppg 19913 gsum2dlem2 19940 imasring 20304 znunit 21541 znrrg 21543 cygznlem2a 21545 cygznlem3 21547 cncmp 23378 cnconn 23408 1stcfb 23431 dfac14 23604 qtopval2 23682 qtopuni 23688 qtopid 23691 qtopcld 23699 qtopcn 23700 qtopeu 23702 qtophmeo 23803 elfm3 23936 ovoliunnul 25495 uniiccdif 25566 dchrzrhcl 27229 lgsdchrval 27338 rpvmasumlem 27471 dchrmusum2 27478 dchrvmasumlem3 27483 dchrisum0ff 27491 dchrisum0flblem1 27492 rpvmasum2 27496 dchrisum0re 27497 dchrisum0lem2a 27501 nodense 27676 bdaydm 27762 bdayon 27764 om2noseqlt 28311 om2noseqlt2 28312 om2noseqf1o 28313 noseqrdgfn 28318 bdayn0sf1o 28382 grpocl 30591 grporndm 30601 vafval 30694 smfval 30696 nvgf 30709 vsfval 30724 hhssabloilem 31352 pjhf 31799 elunop 31963 unopf1o 32007 cnvunop 32009 pjinvari 32282 foresf1o 32594 rabfodom 32595 iunrdx 32654 xppreima 32739 gsumpart 33146 imasmhm 33439 imasghm 33440 imasrhm 33441 qtophaus 34030 sigapildsys 34356 carsgclctunlem3 34514 mtyf 35793 poimirlem26 38026 poimirlem27 38027 volsupnfl 38045 cocanfo 38099 exidreslem 38257 rngosn3 38304 rngodm1dm2 38312 founiiun 45638 founiiun0 45649 issalnnd 46800 sge0fodjrnlem 46871 ismeannd 46922 caragenunicl 46979 fcores 47542 fcoresf1lem 47543 fcoresf1 47544 fcoresfo 47546 3f1oss1 47550 fargshiftfo 47929 uptr2 49723 |
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