| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 7209 | . . . . 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 3928 | . 2 ⊢ (𝐴 ⊆ dom 𝐹 → (𝐵 ∈ 𝐴 → 𝐵 ∈ dom 𝐹)) | |
| 6 | 4, 5 | impel 513 | 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 2141 ⊆ wss 3902 dom cdm 5643 “ cima 5646 Fun wfun 6510 ‘cfv 6516 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6472 df-fun 6518 df-fn 6519 df-fv 6524 |
| This theorem is referenced by: funfvima2d 7211 fnfvima 7212 resfvresima 7214 f1oweALT 7948 tz7.49 8410 phimullem 16805 mrcuni 17644 frlmsslsp 21836 lindfrn 21861 iscldtop 23143 1stcfb 23493 2ndcomap 23506 rnelfm 24001 fmfnfmlem2 24003 fmfnfmlem4 24005 qtopbaslem 24806 tgqioo 24848 bndth 25008 volsup 25606 dyadmbllem 25649 opnmbllem 25651 itg1addlem4 25749 c1liplem1 26046 dvcnvrelem1 26067 dvcnvrelem2 26068 plyco0 26240 plyaddlem1 26261 plymullem1 26262 dvloglem 26701 logf1o2 26703 efopn 26711 nobdaymin 27834 nocvxminlem 27835 axcontlem10 29131 imaelshi 32218 funimass4f 32800 sitgclg 34600 cvmliftlem3 35598 ivthALT 36656 opnmbllem0 38116 ismtyres 38268 heibor1lem 38269 ismrc 43243 aomclem4 43595 |
| Copyright terms: Public domain | W3C validator |