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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 6925 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3178 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6058 | . . 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 515 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (𝐹 “ 𝐵)) → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∃wrex 3087 class class class wbr 5103 “ cima 5654 Fun wfun 6525 ‘cfv 6531 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 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 6487 df-fun 6533 df-fv 6539 |
| This theorem is used by: funimassd 6943 ssimaex 6962 isofrlem 7340 fimaproj 8136 tz7.49 8439 rankwflemb 9783 tcrank 9882 zorn2lem5 10559 zorn2lem6 10560 uniimadom 10609 wunr1om 10785 tskr1om 10833 tskhf 10834 grur1 10886 imadrhmcl 21034 iscldtop 23393 kqfvima 24029 fmfnfmlem4 24256 fmfnfm 24257 qustgpopn 24419 cphsscph 25552 c1liplem1 26296 plypf1 26511 lrrecfr 28311 ltgseg 29041 axcontlem9 29532 uhgrspan1 29866 pthdlem2lem 30335 htthlem 31501 xrofsup 33341 tocyccntz 33687 rhmimaidl 33964 esplymhp 34182 dimval 34215 dimvalfi 34216 txomap 34448 qtophaus 34450 erdszelem7 35931 erdszelem8 35932 mrsub0 36250 mrsubccat 36252 mrsubcn 36253 msubrn 36263 mthmblem 36314 ivthALT 37093 weiunfr 37225 ftc2nc 38588 heibor1lem 38711 aks6d1c4 43142 imacrhmcl 43546 ismrc 43665 relpfrlem 45895 icccncfext 46841 dirkercncflem2 47058 smfpimbor1lem1 47752 imaf1co 50207 |
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