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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 6959 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
| 2 | 1 | reximdv 3181 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
| 3 | elimag 6073 | . . 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 2147 ∃wrex 3090 class class class wbr 5106 “ cima 5659 Fun wfun 6555 ‘cfv 6561 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-pr 5396 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5172 df-id 5551 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-iota 6515 df-fun 6563 df-fv 6569 |
| This theorem is used by: funimassd 6977 ssimaex 6996 isofrlem 7374 fimaproj 8182 tz7.49 8486 rankwflemb 9830 rankwflembOLD 9831 tcrank 9931 zorn2lem5 10608 zorn2lem6 10609 uniimadom 10658 wunr1om 10834 tskr1om 10882 tskhf 10883 grur1 10935 imadrhmcl 21087 iscldtop 23446 kqfvima 24082 fmfnfmlem4 24309 fmfnfm 24310 qustgpopn 24472 cphsscph 25605 c1liplem1 26349 plypf1 26564 lrrecfr 28362 ltgseg 29092 axcontlem9 29583 uhgrspan1 29917 pthdlem2lem 30386 htthlem 31552 xrofsup 33432 tocyccntz 33781 rhmimaidl 34066 esplymhp 34283 dimval 34316 dimvalfi 34317 txomap 34549 qtophaus 34551 acwer1prc 35865 erdszelem7 36142 erdszelem8 36143 mrsub0 36461 mrsubccat 36463 mrsubcn 36464 msubrn 36474 mthmblem 36525 ivthALT 37314 weiunfr 37446 ftc2nc 38825 heibor1lem 38946 aks6d1c4 43377 imacrhmcl 43785 ismrc 43916 relpfrlem 46149 icccncfext 47112 dirkercncflem2 47329 smfpimbor1lem1 48023 imaf1co 50486 |
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