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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 6890 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3153 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6031 | . . 3 ⊢ (𝐴 ∈ (𝐹 “ 𝐵) → (𝐴 ∈ (𝐹 “ 𝐵) ↔ ∃𝑥 ∈ 𝐵 𝑥𝐹𝐴)) | |
| 4 | 3 | ibi 267 | . 2 ⊢ (𝐴 ∈ (𝐹 “ 𝐵) → ∃𝑥 ∈ 𝐵 𝑥𝐹𝐴) |
| 5 | 2, 4 | impel 505 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (𝐹 “ 𝐵)) → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∃wrex 3062 class class class wbr 5100 “ cima 5635 Fun wfun 6494 ‘cfv 6500 |
| 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-8 2116 ax-9 2124 ax-10 2147 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fv 6508 |
| This theorem is referenced by: funimassd 6908 ssimaex 6927 isofrlem 7296 fimaproj 8087 tz7.49 8386 rankwflemb 9717 tcrank 9808 zorn2lem5 10422 zorn2lem6 10423 uniimadom 10466 wunr1om 10642 tskr1om 10690 tskr1om2 10691 grur1 10743 imadrhmcl 20742 iscldtop 23051 kqfvima 23686 fmfnfmlem4 23913 fmfnfm 23914 qustgpopn 24076 cphsscph 25219 c1liplem1 25969 plypf1 26185 lrrecfr 27951 ltgseg 28680 axcontlem9 29057 uhgrspan1 29388 pthdlem2lem 29852 htthlem 31004 xrofsup 32857 tocyccntz 33237 rhmimaidl 33524 esplymhp 33744 dimval 33777 dimvalfi 33778 txomap 34011 qtophaus 34013 erdszelem7 35410 erdszelem8 35411 mrsub0 35729 mrsubccat 35731 mrsubcn 35732 msubrn 35742 mthmblem 35793 ivthALT 36548 weiunfr 36680 ftc2nc 37950 heibor1lem 38057 aks6d1c4 42491 imacrhmcl 42881 ismrc 43055 relpfrlem 45306 icccncfext 46242 dirkercncflem2 46459 smfpimbor1lem1 47153 imaf1co 49511 |
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