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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 6882 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3151 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6023 | . . 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 1541 ∈ wcel 2113 ∃wrex 3060 class class class wbr 5098 “ cima 5627 Fun wfun 6486 ‘cfv 6492 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fv 6500 |
| This theorem is referenced by: funimassd 6900 ssimaex 6919 isofrlem 7286 fimaproj 8077 tz7.49 8376 rankwflemb 9705 tcrank 9796 zorn2lem5 10410 zorn2lem6 10411 uniimadom 10454 wunr1om 10630 tskr1om 10678 tskr1om2 10679 grur1 10731 imadrhmcl 20730 iscldtop 23039 kqfvima 23674 fmfnfmlem4 23901 fmfnfm 23902 qustgpopn 24064 cphsscph 25207 c1liplem1 25957 plypf1 26173 lrrecfr 27939 ltgseg 28668 axcontlem9 29045 uhgrspan1 29376 pthdlem2lem 29840 htthlem 30992 xrofsup 32847 tocyccntz 33226 rhmimaidl 33513 esplymhp 33726 dimval 33757 dimvalfi 33758 txomap 33991 qtophaus 33993 erdszelem7 35391 erdszelem8 35392 mrsub0 35710 mrsubccat 35712 mrsubcn 35713 msubrn 35723 mthmblem 35774 ivthALT 36529 weiunfr 36661 ftc2nc 37903 heibor1lem 38010 aks6d1c4 42378 imacrhmcl 42769 ismrc 42943 relpfrlem 45194 icccncfext 46131 dirkercncflem2 46348 smfpimbor1lem1 47042 imaf1co 49400 |
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