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| Mirrors > Home > MPE Home > Th. List > funssfv | Structured version Visualization version GIF version | ||
| Description: The value of a member of the domain of a subclass of a function. (Contributed by NM, 15-Aug-1994.) |
| Ref | Expression |
|---|---|
| funssfv | ⊢ ((Fun 𝐹 ∧ 𝐺 ⊆ 𝐹 ∧ 𝐴 ∈ dom 𝐺) → (𝐹‘𝐴) = (𝐺‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvres 6880 | . . . 4 ⊢ (𝐴 ∈ dom 𝐺 → ((𝐹 ↾ dom 𝐺)‘𝐴) = (𝐹‘𝐴)) | |
| 2 | 1 | eqcomd 2736 | . . 3 ⊢ (𝐴 ∈ dom 𝐺 → (𝐹‘𝐴) = ((𝐹 ↾ dom 𝐺)‘𝐴)) |
| 3 | funssres 6563 | . . . 4 ⊢ ((Fun 𝐹 ∧ 𝐺 ⊆ 𝐹) → (𝐹 ↾ dom 𝐺) = 𝐺) | |
| 4 | 3 | fveq1d 6863 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐺 ⊆ 𝐹) → ((𝐹 ↾ dom 𝐺)‘𝐴) = (𝐺‘𝐴)) |
| 5 | 2, 4 | sylan9eqr 2787 | . 2 ⊢ (((Fun 𝐹 ∧ 𝐺 ⊆ 𝐹) ∧ 𝐴 ∈ dom 𝐺) → (𝐹‘𝐴) = (𝐺‘𝐴)) |
| 6 | 5 | 3impa 1109 | 1 ⊢ ((Fun 𝐹 ∧ 𝐺 ⊆ 𝐹 ∧ 𝐴 ∈ dom 𝐺) → (𝐹‘𝐴) = (𝐺‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ⊆ wss 3917 dom cdm 5641 ↾ cres 5643 Fun wfun 6508 ‘cfv 6514 |
| 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-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pr 5390 |
| 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-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-nul 4300 df-if 4492 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-opab 5173 df-id 5536 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-res 5653 df-iota 6467 df-fun 6516 df-fv 6522 |
| This theorem is referenced by: fviunfun 7926 funelss 8029 funsssuppss 8172 frrlem10 8277 tfrlem9 8356 tfrlem11 8359 ac6sfi 9238 axdc3lem2 10411 axdc3lem4 10413 imasvscaval 17508 pserdv 26346 subgruhgredgd 29218 subumgredg2 29219 subupgr 29221 sspn 30672 bnj945 34770 bnj1502 34845 bnj545 34892 bnj548 34894 subfacp1lem2a 35174 subfacp1lem2b 35175 subfacp1lem5 35178 cvmliftlem10 35288 cvmliftlem13 35290 |
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