Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > elfvdm | Structured version Visualization version GIF version |
Description: If a function value has a member, then the argument belongs to the domain. (An artifact of our function value definition.) (Contributed by NM, 12-Feb-2007.) (Proof shortened by BJ, 22-Oct-2022.) |
Ref | Expression |
---|---|
elfvdm | ⊢ (𝐴 ∈ (𝐹‘𝐵) → 𝐵 ∈ dom 𝐹) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | n0i 4299 | . 2 ⊢ (𝐴 ∈ (𝐹‘𝐵) → ¬ (𝐹‘𝐵) = ∅) | |
2 | ndmfv 6700 | . 2 ⊢ (¬ 𝐵 ∈ dom 𝐹 → (𝐹‘𝐵) = ∅) | |
3 | 1, 2 | nsyl2 143 | 1 ⊢ (𝐴 ∈ (𝐹‘𝐵) → 𝐵 ∈ dom 𝐹) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2114 ∅c0 4291 dom cdm 5555 ‘cfv 6355 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-nul 5210 ax-pow 5266 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-dm 5565 df-iota 6314 df-fv 6363 |
This theorem is referenced by: elfvex 6703 elfvmptrab1w 6794 fveqdmss 6846 eldmrexrnb 6858 elmpocl 7387 elovmpt3rab1 7405 mpoxeldm 7877 mpoxopn0yelv 7879 mpoxopxnop0 7881 r1pwss 9213 rankwflemb 9222 r1elwf 9225 rankr1ai 9227 rankdmr1 9230 rankr1ag 9231 rankr1c 9250 r1pwcl 9276 cardne 9394 cardsdomelir 9402 r1wunlim 10159 eluzel2 12249 acsfiel 16925 homarcl2 17295 arwrcl 17304 pleval2i 17574 acsdrscl 17780 acsficl 17781 gsumws1 18002 cntzrcl 18457 smndlsmidm 18781 eldprd 19126 isunit 19407 isirred 19449 lbsss 19849 lbssp 19851 lbsind 19852 ply1frcl 20481 elocv 20812 cssi 20828 linds1 20954 linds2 20955 lindsind 20961 eltg4i 21568 eltg3 21570 tg1 21572 tg2 21573 cldrcl 21634 neiss2 21709 lmrcl 21839 iscnp2 21847 kqtop 22353 fbasne0 22438 0nelfb 22439 fbsspw 22440 fbasssin 22444 fbun 22448 trfbas2 22451 trfbas 22452 isfil 22455 filss 22461 fbasweak 22473 fgval 22478 elfg 22479 fgcl 22486 isufil 22511 ufilss 22513 trufil 22518 fmval 22551 elfm3 22558 fmfnfmlem4 22565 fmfnfm 22566 elrnust 22833 metflem 22938 xmetf 22939 xmeteq0 22948 xmettri2 22950 xmetres2 22971 blfvalps 22993 blvalps 22995 blval 22996 blfps 23016 blf 23017 isxms2 23058 tmslem 23092 metuval 23159 lmmbr2 23862 lmmbrf 23865 fmcfil 23875 iscau2 23880 iscauf 23883 caucfil 23886 cmetcaulem 23891 iscmet3 23896 cfilresi 23898 caussi 23900 causs 23901 metcld2 23910 cmetss 23919 bcthlem1 23927 bcth3 23934 cpncn 24533 cpnres 24534 tglngne 26336 wlkdlem3 27466 1wlkdlem3 27918 elunirn2 30396 fpwrelmap 30469 metidval 31130 pstmval 31135 brsiga 31442 measbase 31456 cvmsrcl 32511 snmlval 32578 fneuni 33695 uncf 34886 unccur 34890 caures 35050 ismtyval 35093 isismty 35094 heiborlem10 35113 eldiophb 39403 elmnc 39785 submgmrcl 44098 elbigofrcl 44659 |
Copyright terms: Public domain | W3C validator |