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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 6888 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3152 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6029 | . . 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 3061 class class class wbr 5085 “ cima 5634 Fun wfun 6492 ‘cfv 6498 |
| 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 2708 ax-sep 5231 ax-pr 5375 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fv 6506 |
| This theorem is referenced by: funimassd 6906 ssimaex 6925 isofrlem 7295 fimaproj 8085 tz7.49 8384 rankwflemb 9717 tcrank 9808 zorn2lem5 10422 zorn2lem6 10423 uniimadom 10466 wunr1om 10642 tskr1om 10690 tskr1om2 10691 grur1 10743 imadrhmcl 20774 iscldtop 23060 kqfvima 23695 fmfnfmlem4 23922 fmfnfm 23923 qustgpopn 24085 cphsscph 25218 c1liplem1 25963 plypf1 26177 lrrecfr 27935 ltgseg 28664 axcontlem9 29041 uhgrspan1 29372 pthdlem2lem 29835 htthlem 30988 xrofsup 32840 tocyccntz 33205 rhmimaidl 33492 esplymhp 33712 dimval 33745 dimvalfi 33746 txomap 33978 qtophaus 33980 erdszelem7 35379 erdszelem8 35380 mrsub0 35698 mrsubccat 35700 mrsubcn 35701 msubrn 35711 mthmblem 35762 ivthALT 36517 weiunfr 36649 ftc2nc 38023 heibor1lem 38130 aks6d1c4 42563 imacrhmcl 42959 ismrc 43133 relpfrlem 45380 icccncfext 46315 dirkercncflem2 46532 smfpimbor1lem1 47226 imaf1co 49630 |
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