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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 6932 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3186 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6069 | . . 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 1567 ∈ wcel 2149 ∃wrex 3095 class class class wbr 5113 “ cima 5667 Fun wfun 6533 ‘cfv 6539 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-pr 5407 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-id 5559 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-iota 6495 df-fun 6541 df-fv 6547 |
| This theorem is referenced by: funimassd 6950 ssimaex 6969 isofrlem 7341 fimaproj 8133 tz7.49 8434 rankwflemb 9767 tcrank 9858 zorn2lem5 10486 zorn2lem6 10487 uniimadom 10530 wunr1om 10706 tskr1om 10754 tskr1om2 10755 grur1 10807 imadrhmcl 20880 iscldtop 23223 kqfvima 23858 fmfnfmlem4 24085 fmfnfm 24086 qustgpopn 24248 cphsscph 25381 c1liplem1 26126 plypf1 26340 lrrecfr 28104 ltgseg 28833 axcontlem9 29265 uhgrspan1 29596 pthdlem2lem 30059 htthlem 31212 xrofsup 33055 tocyccntz 33407 rhmimaidl 33686 esplymhp 33905 dimval 33938 dimvalfi 33939 txomap 34171 qtophaus 34173 erdszelem7 35624 erdszelem8 35625 mrsub0 35943 mrsubccat 35945 mrsubcn 35946 msubrn 35956 mthmblem 36007 ivthALT 36771 weiunfr 36903 ftc2nc 38278 heibor1lem 38385 aks6d1c4 42818 imacrhmcl 43215 ismrc 43361 relpfrlem 45591 icccncfext 46530 dirkercncflem2 46747 smfpimbor1lem1 47441 imaf1co 49855 |
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