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Mirrors > Home > MPE Home > Th. List > fco2 | Structured version Visualization version GIF version |
Description: Functionality of a composition with weakened out of domain condition on the first argument. (Contributed by Stefan O'Rear, 11-Mar-2015.) |
Ref | Expression |
---|---|
fco2 | ⊢ (((𝐹 ↾ 𝐵):𝐵⟶𝐶 ∧ 𝐺:𝐴⟶𝐵) → (𝐹 ∘ 𝐺):𝐴⟶𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fco 5971 | . 2 ⊢ (((𝐹 ↾ 𝐵):𝐵⟶𝐶 ∧ 𝐺:𝐴⟶𝐵) → ((𝐹 ↾ 𝐵) ∘ 𝐺):𝐴⟶𝐶) | |
2 | frn 5966 | . . . . 5 ⊢ (𝐺:𝐴⟶𝐵 → ran 𝐺 ⊆ 𝐵) | |
3 | cores 5555 | . . . . 5 ⊢ (ran 𝐺 ⊆ 𝐵 → ((𝐹 ↾ 𝐵) ∘ 𝐺) = (𝐹 ∘ 𝐺)) | |
4 | 2, 3 | syl 17 | . . . 4 ⊢ (𝐺:𝐴⟶𝐵 → ((𝐹 ↾ 𝐵) ∘ 𝐺) = (𝐹 ∘ 𝐺)) |
5 | 4 | adantl 481 | . . 3 ⊢ (((𝐹 ↾ 𝐵):𝐵⟶𝐶 ∧ 𝐺:𝐴⟶𝐵) → ((𝐹 ↾ 𝐵) ∘ 𝐺) = (𝐹 ∘ 𝐺)) |
6 | 5 | feq1d 5943 | . 2 ⊢ (((𝐹 ↾ 𝐵):𝐵⟶𝐶 ∧ 𝐺:𝐴⟶𝐵) → (((𝐹 ↾ 𝐵) ∘ 𝐺):𝐴⟶𝐶 ↔ (𝐹 ∘ 𝐺):𝐴⟶𝐶)) |
7 | 1, 6 | mpbid 221 | 1 ⊢ (((𝐹 ↾ 𝐵):𝐵⟶𝐶 ∧ 𝐺:𝐴⟶𝐵) → (𝐹 ∘ 𝐺):𝐴⟶𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ⊆ wss 3540 ran crn 5039 ↾ cres 5040 ∘ ccom 5042 ⟶wf 5800 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-br 4584 df-opab 4644 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-fun 5806 df-fn 5807 df-f 5808 |
This theorem is referenced by: fsuppcor 8192 prdsringd 18435 prdscrngd 18436 prds1 18437 prdstmdd 21737 prdsxmslem2 22144 eulerpartlemmf 29764 sseqf 29781 poimirlem9 32588 ftc1anclem3 32657 fco2d 37481 |
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