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| Mirrors > Home > MPE Home > Th. List > Mathboxes > afvelrn | Structured version Visualization version GIF version | ||
| Description: A function's value belongs to its range, analogous to fvelrn 7019. (Contributed by Alexander van der Vekens, 25-May-2017.) |
| Ref | Expression |
|---|---|
| afvelrn | ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (𝐹'''𝐴) ∈ ran 𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funres 6532 | . . . . . 6 ⊢ (Fun 𝐹 → Fun (𝐹 ↾ {𝐴})) | |
| 2 | 1 | anim1i 615 | . . . . 5 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (Fun (𝐹 ↾ {𝐴}) ∧ 𝐴 ∈ dom 𝐹)) |
| 3 | 2 | ancomd 461 | . . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (𝐴 ∈ dom 𝐹 ∧ Fun (𝐹 ↾ {𝐴}))) |
| 4 | df-dfat 47307 | . . . 4 ⊢ (𝐹 defAt 𝐴 ↔ (𝐴 ∈ dom 𝐹 ∧ Fun (𝐹 ↾ {𝐴}))) | |
| 5 | 3, 4 | sylibr 234 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → 𝐹 defAt 𝐴) |
| 6 | afvfundmfveq 47326 | . . . 4 ⊢ (𝐹 defAt 𝐴 → (𝐹'''𝐴) = (𝐹‘𝐴)) | |
| 7 | 6 | eqcomd 2740 | . . 3 ⊢ (𝐹 defAt 𝐴 → (𝐹‘𝐴) = (𝐹'''𝐴)) |
| 8 | 5, 7 | syl 17 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (𝐹‘𝐴) = (𝐹'''𝐴)) |
| 9 | fvelrn 7019 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (𝐹‘𝐴) ∈ ran 𝐹) | |
| 10 | 8, 9 | eqeltrrd 2835 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (𝐹'''𝐴) ∈ ran 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 {csn 4578 dom cdm 5622 ran crn 5623 ↾ cres 5624 Fun wfun 6484 ‘cfv 6490 defAt wdfat 47304 '''cafv 47305 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-int 4901 df-br 5097 df-opab 5159 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-iota 6446 df-fun 6492 df-fn 6493 df-fv 6498 df-aiota 47273 df-dfat 47307 df-afv 47308 |
| This theorem is referenced by: fnafvelrn 47357 |
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