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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 6710 | . . 3 ⊢ (Fun 𝐹 → (𝑥𝐹𝐴 → (𝐹‘𝑥) = 𝐴)) | |
2 | 1 | reximdv 3273 | . 2 ⊢ (Fun 𝐹 → (∃𝑥 ∈ 𝐵 𝑥𝐹𝐴 → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴)) |
3 | elimag 5927 | . . 3 ⊢ (𝐴 ∈ (𝐹 “ 𝐵) → (𝐴 ∈ (𝐹 “ 𝐵) ↔ ∃𝑥 ∈ 𝐵 𝑥𝐹𝐴)) | |
4 | 3 | ibi 269 | . 2 ⊢ (𝐴 ∈ (𝐹 “ 𝐵) → ∃𝑥 ∈ 𝐵 𝑥𝐹𝐴) |
5 | 2, 4 | impel 508 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ (𝐹 “ 𝐵)) → ∃𝑥 ∈ 𝐵 (𝐹‘𝑥) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 ∃wrex 3139 class class class wbr 5058 “ cima 5552 Fun wfun 6343 ‘cfv 6349 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pr 5321 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-opab 5121 df-id 5454 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-iota 6308 df-fun 6351 df-fv 6357 |
This theorem is referenced by: ssimaex 6742 isofrlem 7087 fimaproj 7823 tz7.49 8075 rankwflemb 9216 tcrank 9307 zorn2lem5 9916 zorn2lem6 9917 uniimadom 9960 wunr1om 10135 tskr1om 10183 tskr1om2 10184 grur1 10236 iscldtop 21697 kqfvima 22332 fmfnfmlem4 22559 fmfnfm 22560 qustgpopn 22722 cphsscph 23848 c1liplem1 24587 plypf1 24796 ltgseg 26376 axcontlem9 26752 uhgrspan1 27079 pthdlem2lem 27542 htthlem 28688 xrofsup 30486 tocyccntz 30781 dimval 30996 dimvalfi 30997 txomap 31093 qtophaus 31095 erdszelem7 32439 erdszelem8 32440 mrsub0 32758 mrsubccat 32760 mrsubcn 32761 msubrn 32771 mthmblem 32822 ivthALT 33678 ftc2nc 34970 heibor1lem 35081 ismrc 39291 funimassd 41490 icccncfext 42163 dirkercncflem2 42383 smfpimbor1lem1 43067 |
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