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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 7234 | . . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐵 ∈ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴))) | |
| 2 | 1 | ex 418 | . . . 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 3925 | . 2 ⊢ (𝐴 ⊆ dom 𝐹 → (𝐵 ∈ 𝐴 → 𝐵 ∈ dom 𝐹)) | |
| 6 | 4, 5 | impel 515 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 ⊆ wss 3899 dom cdm 5651 “ cima 5654 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 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6493 df-fun 6539 df-fn 6540 df-fv 6545 |
| This theorem is used by: funfvima2d 7236 fnfvima 7237 resfvresima 7239 f1oweALT 7982 tz7.49 8448 phimullem 16949 mrcuni 17788 frlmsslsp 22095 lindfrn 22120 iscldtop 23406 1stcfb 23756 2ndcomap 23770 rnelfm 24265 fmfnfmlem2 24267 fmfnfmlem4 24269 qtopbaslem 25070 tgqioo 25112 bndth 25272 volsup 25870 dyadmbllem 25913 opnmbllem 25915 itg1addlem4 26013 c1liplem1 26309 dvcnvrelem1 26330 dvcnvrelem2 26331 plyco0 26503 plyaddlem1 26525 plymullem1 26526 dvloglem 26969 logf1o2 26971 efopn 26979 nobdaymin 28132 nocvxminlem 28133 axcontlem10 29544 imaelshi 32653 funimass4f 33224 sitgclg 34967 cvmliftlem3 36031 ivthALT 37103 opnmbllem0 38554 ismtyres 38722 heibor1lem 38723 ismrc 43691 aomclem4 44043 |
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