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Mirrors > Home > MPE Home > Th. List > fcoi2 | Structured version Visualization version GIF version |
Description: Composition of restricted identity and a mapping. (Contributed by NM, 13-Dec-2003.) (Proof shortened by Andrew Salmon, 17-Sep-2011.) |
Ref | Expression |
---|---|
fcoi2 | ⊢ (𝐹:𝐴⟶𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = 𝐹) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-f 5808 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
2 | cores 5555 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = ( I ∘ 𝐹)) | |
3 | fnrel 5903 | . . . 4 ⊢ (𝐹 Fn 𝐴 → Rel 𝐹) | |
4 | coi2 5569 | . . . 4 ⊢ (Rel 𝐹 → ( I ∘ 𝐹) = 𝐹) | |
5 | 3, 4 | syl 17 | . . 3 ⊢ (𝐹 Fn 𝐴 → ( I ∘ 𝐹) = 𝐹) |
6 | 2, 5 | sylan9eqr 2666 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) → (( I ↾ 𝐵) ∘ 𝐹) = 𝐹) |
7 | 1, 6 | sylbi 206 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = 𝐹) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ⊆ wss 3540 I cid 4948 ran crn 5039 ↾ cres 5040 ∘ ccom 5042 Rel wrel 5043 Fn wfn 5799 ⟶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: fcof1oinvd 6448 mapen 8009 mapfien 8196 hashfacen 13095 cofulid 16373 setccatid 16557 estrccatid 16595 symggrp 17643 f1omvdco2 17691 symggen 17713 psgnunilem1 17736 gsumval3 18131 gsumzf1o 18136 frgpcyg 19741 f1linds 19983 qtophmeo 21430 motgrp 25238 hoico2 28000 fcoinver 28798 fcobij 28888 symgfcoeu 29176 subfacp1lem5 30420 ltrncoidN 34432 trlcoat 35029 trlcone 35034 cdlemg47a 35040 cdlemg47 35042 trljco 35046 tgrpgrplem 35055 tendo1mul 35076 tendo0pl 35097 cdlemkid2 35230 cdlemk45 35253 cdlemk53b 35262 erng1r 35301 tendocnv 35328 dvalveclem 35332 dva0g 35334 dvhgrp 35414 dvhlveclem 35415 dvh0g 35418 cdlemn8 35511 dihordlem7b 35522 dihopelvalcpre 35555 mendring 36781 rngccatidALTV 41781 ringccatidALTV 41844 |
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