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| Mirrors > Home > MPE Home > Th. List > funfvima2 | Structured version Visualization version GIF version | ||
| Description: A function's value in an included preimage belongs to the image. (Contributed by NM, 3-Feb-1997.) |
| Ref | Expression |
|---|---|
| funfvima2 | ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funfvima 7228 | . . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐵 ∈ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴))) | |
| 2 | 1 | ex 417 | . . . 4 ⊢ (Fun 𝐹 → (𝐵 ∈ dom 𝐹 → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴)))) |
| 3 | 2 | com23 87 | . . 3 ⊢ (Fun 𝐹 → (𝐵 ∈ 𝐴 → (𝐵 ∈ dom 𝐹 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴)))) |
| 4 | 3 | a2d 30 | . 2 ⊢ (Fun 𝐹 → ((𝐵 ∈ 𝐴 → 𝐵 ∈ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴)))) |
| 5 | ssel 3931 | . 2 ⊢ (𝐴 ⊆ dom 𝐹 → (𝐵 ∈ 𝐴 → 𝐵 ∈ dom 𝐹)) | |
| 6 | 4, 5 | impel 514 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2143 ⊆ wss 3905 dom cdm 5661 “ cima 5664 Fun wfun 6530 ‘cfv 6536 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-fv 6544 |
| This theorem is referenced by: funfvima2d 7230 fnfvima 7231 resfvresima 7233 f1oweALT 7965 tz7.49 8428 phimullem 16833 mrcuni 17672 frlmsslsp 21946 lindfrn 21971 iscldtop 23252 1stcfb 23602 2ndcomap 23615 rnelfm 24110 fmfnfmlem2 24112 fmfnfmlem4 24114 qtopbaslem 24915 tgqioo 24957 bndth 25117 volsup 25715 dyadmbllem 25758 opnmbllem 25760 itg1addlem4 25858 c1liplem1 26155 dvcnvrelem1 26176 dvcnvrelem2 26177 plyco0 26349 plyaddlem1 26370 plymullem1 26371 dvloglem 26813 logf1o2 26815 efopn 26823 nobdaymin 27946 nocvxminlem 27947 axcontlem10 29323 imaelshi 32410 funimass4f 32982 sitgclg 34732 cvmliftlem3 35779 ivthALT 36846 opnmbllem0 38307 ismtyres 38459 heibor1lem 38460 ismrc 43432 aomclem4 43784 |
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