| Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
| 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 7048. (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 6558 | . . . . . 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 47120 | . . . 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 47139 | . . . 4 ⊢ (𝐹 defAt 𝐴 → (𝐹'''𝐴) = (𝐹‘𝐴)) | |
| 7 | 6 | eqcomd 2735 | . . 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 7048 | . 2 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (𝐹‘𝐴) ∈ ran 𝐹) | |
| 10 | 8, 9 | eqeltrrd 2829 | 1 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → (𝐹'''𝐴) ∈ ran 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 {csn 4589 dom cdm 5638 ran crn 5639 ↾ cres 5640 Fun wfun 6505 ‘cfv 6511 defAt wdfat 47117 '''cafv 47118 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pr 5387 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-int 4911 df-br 5108 df-opab 5170 df-id 5533 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-iota 6464 df-fun 6513 df-fn 6514 df-fv 6519 df-aiota 47086 df-dfat 47120 df-afv 47121 |
| This theorem is referenced by: fnafvelrn 47170 |
| Copyright terms: Public domain | W3C validator |