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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 6970 | . . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐵 ∈ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴))) | |
2 | 1 | ex 416 | . . . 4 ⊢ (Fun 𝐹 → (𝐵 ∈ dom 𝐹 → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴)))) |
3 | 2 | com23 86 | . . 3 ⊢ (Fun 𝐹 → (𝐵 ∈ 𝐴 → (𝐵 ∈ dom 𝐹 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴)))) |
4 | 3 | a2d 29 | . 2 ⊢ (Fun 𝐹 → ((𝐵 ∈ 𝐴 → 𝐵 ∈ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴)))) |
5 | ssel 3908 | . 2 ⊢ (𝐴 ⊆ dom 𝐹 → (𝐵 ∈ 𝐴 → 𝐵 ∈ dom 𝐹)) | |
6 | 4, 5 | impel 509 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → (𝐵 ∈ 𝐴 → (𝐹‘𝐵) ∈ (𝐹 “ 𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2111 ⊆ wss 3881 dom cdm 5519 “ cima 5522 Fun wfun 6318 ‘cfv 6324 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-fv 6332 |
This theorem is referenced by: funfvima2d 6972 fnfvima 6973 resfvresima 6975 f1oweALT 7655 tz7.49 8064 phimullem 16106 mrcuni 16884 frlmsslsp 20485 lindfrn 20510 iscldtop 21700 1stcfb 22050 2ndcomap 22063 rnelfm 22558 fmfnfmlem2 22560 fmfnfmlem4 22562 qtopbaslem 23364 tgqioo 23405 bndth 23563 volsup 24160 dyadmbllem 24203 opnmbllem 24205 itg1addlem4 24303 c1liplem1 24599 dvcnvrelem1 24620 dvcnvrelem2 24621 plyco0 24789 plyaddlem1 24810 plymullem1 24811 dvloglem 25239 logf1o2 25241 efopn 25249 axcontlem10 26767 imaelshi 29841 funimass4f 30396 sitgclg 31710 cvmliftlem3 32647 nocvxminlem 33360 nocvxmin 33361 ivthALT 33796 opnmbllem0 35093 ismtyres 35246 heibor1lem 35247 ismrc 39642 aomclem4 40001 |
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