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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 618 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| 3 | df-fo 6504 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵)) | |
| 4 | df-f 6502 | . 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 3889 ran crn 5632 Fn wfn 6493 ⟶wf 6494 –onto→wfo 6496 |
| 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 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2728 df-ss 3906 df-f 6502 df-fo 6504 |
| This theorem is referenced by: fofun 6753 fofn 6754 dffo2 6756 foima 6757 focnvimacdmdm 6764 focofo 6765 resdif 6801 fimacnvinrn 7023 fompt 7070 fconst5 7161 cocan2 7247 foeqcnvco 7255 soisoi 7283 ffoss 7899 focdmex 7909 opco1 8073 opco2 8074 tposf2 8200 smoiso2 8309 mapfoss 8799 ssdomg 8947 fopwdom 9023 unfilem2 9216 fodomfib 9239 fodomfibOLD 9241 fofinf1o 9242 brwdomn0 9484 fowdom 9486 wdomtr 9490 wdomima2g 9501 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 14504 supcvg 15821 ruclem13 16209 imasval 17475 imasle 17487 imasaddfnlem 17492 imasaddflem 17494 imasvscafn 17501 imasvscaf 17503 imasless 17504 homadm 18007 homacd 18008 dmaf 18016 cdaf 18017 setcepi 18055 imasmnd2 18742 sursubmefmnd 18864 imasgrp2 19031 mhmid 19039 mhmmnd 19040 mhmfmhm 19041 ghmgrp 19042 efgred2 19728 ghmfghm 19805 ghmcyg 19871 gsumval3 19882 gsumzoppg 19919 gsum2dlem2 19946 imasring 20310 znunit 21543 znrrg 21545 cygznlem2a 21547 cygznlem3 21549 cncmp 23357 cnconn 23387 1stcfb 23410 dfac14 23583 qtopval2 23661 qtopuni 23667 qtopid 23670 qtopcld 23678 qtopcn 23679 qtopeu 23681 qtophmeo 23782 elfm3 23915 ovoliunnul 25474 uniiccdif 25545 dchrzrhcl 27208 lgsdchrval 27317 rpvmasumlem 27450 dchrmusum2 27457 dchrvmasumlem3 27462 dchrisum0ff 27470 dchrisum0flblem1 27471 rpvmasum2 27475 dchrisum0re 27476 dchrisum0lem2a 27480 nodense 27656 bdaydm 27742 bdayon 27744 om2noseqlt 28291 om2noseqlt2 28292 om2noseqf1o 28293 noseqrdgfn 28298 bdayn0sf1o 28362 grpocl 30571 grporndm 30581 vafval 30674 smfval 30676 nvgf 30689 vsfval 30704 hhssabloilem 31332 pjhf 31779 elunop 31943 unopf1o 31987 cnvunop 31989 pjinvari 32262 foresf1o 32574 rabfodom 32575 iunrdx 32633 xppreima 32718 gsumpart 33124 imasmhm 33414 imasghm 33415 imasrhm 33416 qtophaus 33980 sigapildsys 34306 carsgclctunlem3 34464 mtyf 35734 poimirlem26 37967 poimirlem27 37968 volsupnfl 37986 cocanfo 38040 exidreslem 38198 rngosn3 38245 rngodm1dm2 38253 founiiun 45609 founiiun0 45620 issalnnd 46773 sge0fodjrnlem 46844 ismeannd 46895 caragenunicl 46952 fcores 47515 fcoresf1lem 47516 fcoresf1 47517 fcoresfo 47519 3f1oss1 47523 fargshiftfo 47902 uptr2 49696 |
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