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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 6930 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3179 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6064 | . . 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 3088 class class class wbr 5107 “ cima 5662 Fun wfun 6531 ‘cfv 6537 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-pr 5402 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fv 6545 |
| This theorem is used by: funimassd 6948 ssimaex 6967 isofrlem 7345 fimaproj 8137 tz7.49 8438 rankwflemb 9779 tcrank 9870 zorn2lem5 10506 zorn2lem6 10507 uniimadom 10556 wunr1om 10732 tskr1om 10780 tskr1om2 10781 grur1 10833 imadrhmcl 20969 iscldtop 23326 kqfvima 23962 fmfnfmlem4 24189 fmfnfm 24190 qustgpopn 24352 cphsscph 25485 c1liplem1 26230 plypf1 26445 lrrecfr 28216 ltgseg 28946 axcontlem9 29437 uhgrspan1 29771 pthdlem2lem 30240 htthlem 31406 xrofsup 33246 tocyccntz 33592 rhmimaidl 33868 esplymhp 34086 dimval 34119 dimvalfi 34120 txomap 34352 qtophaus 34354 erdszelem7 35784 erdszelem8 35785 mrsub0 36103 mrsubccat 36105 mrsubcn 36106 msubrn 36116 mthmblem 36167 ivthALT 36962 weiunfr 37094 ftc2nc 38459 heibor1lem 38567 aks6d1c4 42998 imacrhmcl 43410 ismrc 43554 relpfrlem 45784 icccncfext 46723 dirkercncflem2 46940 smfpimbor1lem1 47634 imaf1co 50089 |
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