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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⟶onto𝐵 → 𝐹:𝐴⟶𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqimss 3971 | . . 3 ⊢ (ran 𝐹 = 𝐵 → ran 𝐹 ⊆ 𝐵) | |
| 2 | 1 | anim2i 629 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵) → (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| 3 | df-fo 6564 | . 2 ⊢ (𝐹:𝐴⟶onto𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = 𝐵)) | |
| 4 | df-f 6562 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
| 5 | 2, 3, 4 | 3imtr4i 295 | 1 ⊢ (𝐹:𝐴⟶onto𝐵 → 𝐹:𝐴⟶𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ⊆ wss 3900 ran crn 5656 Fn wfn 6553 ⟶wf 6554 ⟶ontowfo 6556 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2755 df-ss 3901 df-f 6562 df-fo 6564 |
| This theorem is used by: fofun 6819 fofn 6820 dffo2 6822 foima 6823 focnvimacdmdm 6830 focofo 6831 resdif 6868 fimacnvinrn 7095 fompt 7142 fconst5 7235 cocan2 7323 foeqcnvco 7331 soisoi 7359 ffoss 7982 focdmex 7992 opco1 8161 opco2 8162 tposf2 8295 smoiso2 8405 mapfoss 8902 ssdomg 9055 fopwdom 9132 unfilem2 9326 fodomfib 9348 fofinf1o 9349 brwdomn0 9590 fowdom 9592 wdomtr 9596 wdomima2g 9607 fodomfi2 10166 wdomfil 10167 alephiso 10204 iunfictbso 10220 cofsmo 10374 isf32lem10 10467 fin1a2lem7 10511 fodomb 10632 iunfo 10650 tskuni 10895 gruima 10914 gruen 10924 axpre-sup 11281 wrdsymb 14714 supcvg 16054 ruclem13 16439 imasval 17712 imasle 17724 imasaddfnlem 17729 imasaddflem 17731 imasvscafn 17738 imasvscaf 17740 imasless 17741 homadm 18244 homacd 18245 dmaf 18253 cdaf 18254 setcepi 18292 imasmgm2 18892 imasmnd2 18997 sursubmefmnd 19121 imasgrp2 19294 mhmid 19302 mhmmnd 19303 mhmfmhm 19304 ghmgrp 19305 efgred2 19997 ghmfghm 20074 ghmcyg 20140 gsumval3 20151 gsumzoppg 20188 gsum2dlem2 20215 imasring 20590 znunit 21899 znrrg 21901 cygznlem2a 21903 cygznlem3 21905 cncmp 23740 cnconn 23770 1stcfb 23793 dfac14 23967 qtopval2 24045 qtopuni 24051 qtopid 24054 qtopcld 24062 qtopcn 24063 qtopeu 24065 qtophmeo 24166 elfm3 24299 ovoliunnul 25858 uniiccdif 25929 dchrzrhcl 27602 lgsdchrval 27711 rpvmasumlem 27844 dchrmusum2 27851 dchrvmasumlem3 27856 dchrisum0ff 27864 dchrisum0flblem1 27865 rpvmasum2 27869 dchrisum0re 27870 dchrisum0lem2a 27874 nodense 28079 bdaydmOLD 28166 bdayon 28168 om2noseqlt 28715 om2noseqlt2 28716 om2noseqf1o 28717 noseqrdgfn 28722 bdayn0sf1o 28786 grpocl 31132 grporndm 31142 vafval 31235 smfval 31237 nvgf 31250 vsfval 31265 hhssabloilem 31893 pjhf 32340 elunop 32504 unopf1o 32548 cnvunop 32550 pjinvari 32823 foresf1o 33172 rabfodom 33173 iunrdx 33230 xppreima 33311 gsumpart 33694 imasmhm 33985 imasghm 33986 imasrhm 33987 qtophaus 34538 sigapildsys 34865 carsgclctunlem3 35022 werankwe 35821 werankwe2 35822 dfscott3 35827 mtyf 36484 poimirlem26 38756 poimirlem27 38757 volsupnfl 38775 cocanfo 38845 exidreslem 39003 rngosn3 39050 rngodm1dm2 39058 founiiun 46399 founiiun0 46410 issalnnd 47560 sge0fodjrnlem 47631 ismeannd 47682 caragenunicl 47739 fcores 48342 fcoresf1lem 48343 fcoresf1 48344 fcoresfo 48346 3f1oss1 48350 fargshiftfo 48729 uptr2 50542 |
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