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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 3155 | . 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 268 | . 2 ⊢ (𝐴 ∈ (𝐹 “ 𝐵) → ∃𝑥 ∈ 𝐵 𝑥𝐹𝐴) |
| 5 | 2, 4 | impel 510 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (𝐹 “ 𝐵)) → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ∃wrex 3064 class class class wbr 5079 “ cima 5628 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 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-pr 5369 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6448 df-fun 6494 df-fv 6500 |
| This theorem is referenced by: funimassd 6900 ssimaex 6919 isofrlem 7291 fimaproj 8082 tz7.49 8381 rankwflemb 9715 tcrank 9806 zorn2lem5 10420 zorn2lem6 10421 uniimadom 10464 wunr1om 10640 tskr1om 10688 tskr1om2 10689 grur1 10741 imadrhmcl 20776 iscldtop 23085 kqfvima 23720 fmfnfmlem4 23947 fmfnfm 23948 qustgpopn 24110 cphsscph 25243 c1liplem1 25988 plypf1 26202 lrrecfr 27960 ltgseg 28689 axcontlem9 29066 uhgrspan1 29397 pthdlem2lem 29860 htthlem 31013 xrofsup 32866 tocyccntz 33232 rhmimaidl 33522 esplymhp 33759 dimval 33792 dimvalfi 33793 txomap 34025 qtophaus 34027 erdszelem7 35432 erdszelem8 35433 mrsub0 35751 mrsubccat 35753 mrsubcn 35754 msubrn 35764 mthmblem 35815 ivthALT 36570 weiunfr 36702 ftc2nc 38076 heibor1lem 38183 aks6d1c4 42616 imacrhmcl 43011 ismrc 43157 relpfrlem 45404 icccncfext 46337 dirkercncflem2 46554 smfpimbor1lem1 47248 imaf1co 49652 |
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