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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 626 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| 3 | df-fo 6523 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵)) | |
| 4 | df-f 6521 | . 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 399 = wceq 1559 ⊆ wss 3904 ran crn 5646 Fn wfn 6512 ⟶wf 6513 –onto→wfo 6515 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-9 2151 ax-ext 2733 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-ex 1799 df-cleq 2753 df-ss 3921 df-f 6521 df-fo 6523 |
| This theorem is referenced by: fofun 6775 fofn 6776 dffo2 6778 foima 6779 focnvimacdmdm 6786 focofo 6787 resdif 6824 fimacnvinrn 7048 fompt 7095 fconst5 7186 cocan2 7272 foeqcnvco 7280 soisoi 7308 ffoss 7923 focdmex 7933 opco1 8097 opco2 8098 tposf2 8225 smoiso2 8335 mapfoss 8829 ssdomg 8977 fopwdom 9053 unfilem2 9246 fodomfib 9269 fodomfibOLD 9271 fofinf1o 9272 brwdomn0 9514 fowdom 9516 wdomtr 9520 wdomima2g 9531 fodomfi2 10013 wdomfil 10014 alephiso 10051 iunfictbso 10067 cofsmo 10223 isf32lem10 10316 fin1a2lem7 10360 fodomb 10480 iunfo 10493 tskuni 10738 gruima 10757 gruen 10767 axpre-sup 11124 wrdsymb 14552 supcvg 15869 ruclem13 16257 imasval 17524 imasle 17536 imasaddfnlem 17541 imasaddflem 17543 imasvscafn 17550 imasvscaf 17552 imasless 17553 homadm 18056 homacd 18057 dmaf 18065 cdaf 18066 setcepi 18104 imasmnd2 18791 sursubmefmnd 18913 imasgrp2 19080 mhmid 19088 mhmmnd 19089 mhmfmhm 19090 ghmgrp 19091 efgred2 19776 ghmfghm 19853 ghmcyg 19919 gsumval3 19930 gsumzoppg 19967 gsum2dlem2 19994 imasring 20358 znunit 21595 znrrg 21597 cygznlem2a 21599 cygznlem3 21601 cncmp 23432 cnconn 23462 1stcfb 23485 dfac14 23658 qtopval2 23736 qtopuni 23742 qtopid 23745 qtopcld 23753 qtopcn 23754 qtopeu 23756 qtophmeo 23857 elfm3 23990 ovoliunnul 25549 uniiccdif 25620 dchrzrhcl 27286 lgsdchrval 27395 rpvmasumlem 27528 dchrmusum2 27535 dchrvmasumlem3 27540 dchrisum0ff 27548 dchrisum0flblem1 27549 rpvmasum2 27553 dchrisum0re 27554 dchrisum0lem2a 27558 nodense 27733 bdaydmOLD 27820 bdayon 27822 om2noseqlt 28369 om2noseqlt2 28370 om2noseqf1o 28371 noseqrdgfn 28376 bdayn0sf1o 28440 grpocl 30649 grporndm 30659 vafval 30752 smfval 30754 nvgf 30767 vsfval 30782 hhssabloilem 31410 pjhf 31857 elunop 32021 unopf1o 32065 cnvunop 32067 pjinvari 32340 foresf1o 32652 rabfodom 32653 iunrdx 32712 xppreima 32797 gsumpart 33204 imasmhm 33501 imasghm 33502 imasrhm 33503 qtophaus 34094 sigapildsys 34420 carsgclctunlem3 34578 mtyf 35866 poimirlem26 38109 poimirlem27 38110 volsupnfl 38128 cocanfo 38182 exidreslem 38340 rngosn3 38387 rngodm1dm2 38395 founiiun 45721 founiiun0 45732 issalnnd 46883 sge0fodjrnlem 46954 ismeannd 47005 caragenunicl 47062 fcores 47625 fcoresf1lem 47626 fcoresf1 47627 fcoresfo 47629 3f1oss1 47633 fargshiftfo 48012 uptr2 49806 |
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