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| Mirrors > Home > MPE Home > Th. List > fvelima | Structured version Visualization version GIF version | ||
| Description: Function value in an image. Part of Theorem 4.4(iii) of [Monk1] p. 42. (Contributed by NM, 29-Apr-2004.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) |
| Ref | Expression |
|---|---|
| fvelima | ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (𝐹 “ 𝐵)) → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funbrfv 6919 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3180 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6056 | . . 3 ⊢ (𝐴 ∈ (𝐹 “ 𝐵) → (𝐴 ∈ (𝐹 “ 𝐵) ↔ ∃𝑥 ∈ 𝐵 𝑥𝐹𝐴)) | |
| 4 | 3 | ibi 270 | . 2 ⊢ (𝐴 ∈ (𝐹 “ 𝐵) → ∃𝑥 ∈ 𝐵 𝑥𝐹𝐴) |
| 5 | 2, 4 | impel 514 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (𝐹 “ 𝐵)) → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1563 ∈ wcel 2145 ∃wrex 3089 class class class wbr 5104 “ cima 5654 Fun wfun 6519 ‘cfv 6525 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-12 2215 ax-ext 2737 ax-sep 5250 ax-pr 5394 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5105 df-opab 5167 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6481 df-fun 6527 df-fv 6533 |
| This theorem is referenced by: funimassd 6937 ssimaex 6956 isofrlem 7328 fimaproj 8119 tz7.49 8420 rankwflemb 9753 tcrank 9844 zorn2lem5 10472 zorn2lem6 10473 uniimadom 10516 wunr1om 10692 tskr1om 10740 tskr1om2 10741 grur1 10793 imadrhmcl 20866 iscldtop 23209 kqfvima 23844 fmfnfmlem4 24071 fmfnfm 24072 qustgpopn 24234 cphsscph 25367 c1liplem1 26112 plypf1 26326 lrrecfr 28090 ltgseg 28819 axcontlem9 29227 uhgrspan1 29558 pthdlem2lem 30021 htthlem 31174 xrofsup 33020 tocyccntz 33372 rhmimaidl 33651 esplymhp 33870 dimval 33903 dimvalfi 33904 txomap 34136 qtophaus 34138 erdszelem7 35555 erdszelem8 35556 mrsub0 35874 mrsubccat 35876 mrsubcn 35877 msubrn 35887 mthmblem 35938 ivthALT 36703 weiunfr 36835 ftc2nc 38208 heibor1lem 38315 aks6d1c4 42748 imacrhmcl 43143 ismrc 43289 relpfrlem 45521 icccncfext 46460 dirkercncflem2 46677 smfpimbor1lem1 47371 imaf1co 49785 |
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