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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 6362 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
2 | cores 6093 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = ( I ∘ 𝐹)) | |
3 | fnrel 6458 | . . . 4 ⊢ (𝐹 Fn 𝐴 → Rel 𝐹) | |
4 | coi2 6107 | . . . 4 ⊢ (Rel 𝐹 → ( I ∘ 𝐹) = 𝐹) | |
5 | 3, 4 | syl 17 | . . 3 ⊢ (𝐹 Fn 𝐴 → ( I ∘ 𝐹) = 𝐹) |
6 | 2, 5 | sylan9eqr 2793 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) → (( I ↾ 𝐵) ∘ 𝐹) = 𝐹) |
7 | 1, 6 | sylbi 220 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = 𝐹) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1543 ⊆ wss 3853 I cid 5439 ran crn 5537 ↾ cres 5538 ∘ ccom 5540 Rel wrel 5541 Fn wfn 6353 ⟶wf 6354 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-br 5040 df-opab 5102 df-id 5440 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-fun 6360 df-fn 6361 df-f 6362 |
This theorem is referenced by: fcof1oinvd 7081 mapen 8788 mapfien 9002 hashfacen 13983 hashfacenOLD 13984 cofulid 17350 setccatid 17544 estrccatid 17593 efmndid 18269 efmndmnd 18270 symggrp 18746 f1omvdco2 18794 symggen 18816 psgnunilem1 18839 gsumval3 19246 gsumzf1o 19251 frgpcyg 20492 f1linds 20741 qtophmeo 22668 motgrp 26588 hoico2 29792 fcoinver 30619 fcobij 30731 symgfcoeu 31024 symgcom 31025 pmtrcnel2 31032 cycpmconjs 31096 subfacp1lem5 32813 ltrncoidN 37828 trlcoat 38423 trlcone 38428 cdlemg47a 38434 cdlemg47 38436 trljco 38440 tgrpgrplem 38449 tendo1mul 38470 tendo0pl 38491 cdlemkid2 38624 cdlemk45 38647 cdlemk53b 38656 erng1r 38695 tendocnv 38721 dvalveclem 38725 dva0g 38727 dvhgrp 38807 dvhlveclem 38808 dvh0g 38811 cdlemn8 38904 dihordlem7b 38915 dihopelvalcpre 38948 mendring 40661 rngccatidALTV 45163 ringccatidALTV 45226 |
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