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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 6359 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
2 | cores 6102 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = ( I ∘ 𝐹)) | |
3 | fnrel 6454 | . . . 4 ⊢ (𝐹 Fn 𝐴 → Rel 𝐹) | |
4 | coi2 6116 | . . . 4 ⊢ (Rel 𝐹 → ( I ∘ 𝐹) = 𝐹) | |
5 | 3, 4 | syl 17 | . . 3 ⊢ (𝐹 Fn 𝐴 → ( I ∘ 𝐹) = 𝐹) |
6 | 2, 5 | sylan9eqr 2878 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) → (( I ↾ 𝐵) ∘ 𝐹) = 𝐹) |
7 | 1, 6 | sylbi 219 | 1 ⊢ (𝐹:𝐴⟶𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = 𝐹) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1537 ⊆ wss 3936 I cid 5459 ran crn 5556 ↾ cres 5557 ∘ ccom 5559 Rel wrel 5560 Fn wfn 6350 ⟶wf 6351 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-br 5067 df-opab 5129 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-fun 6357 df-fn 6358 df-f 6359 |
This theorem is referenced by: fcof1oinvd 7049 mapen 8681 mapfien 8871 hashfacen 13813 cofulid 17160 setccatid 17344 estrccatid 17382 efmndid 18053 efmndmnd 18054 symggrp 18528 f1omvdco2 18576 symggen 18598 psgnunilem1 18621 gsumval3 19027 gsumzf1o 19032 frgpcyg 20720 f1linds 20969 qtophmeo 22425 motgrp 26329 hoico2 29534 fcoinver 30357 fcobij 30458 symgfcoeu 30726 symgcom 30727 pmtrcnel2 30734 cycpmconjs 30798 subfacp1lem5 32431 ltrncoidN 37279 trlcoat 37874 trlcone 37879 cdlemg47a 37885 cdlemg47 37887 trljco 37891 tgrpgrplem 37900 tendo1mul 37921 tendo0pl 37942 cdlemkid2 38075 cdlemk45 38098 cdlemk53b 38107 erng1r 38146 tendocnv 38172 dvalveclem 38176 dva0g 38178 dvhgrp 38258 dvhlveclem 38259 dvh0g 38262 cdlemn8 38355 dihordlem7b 38366 dihopelvalcpre 38399 mendring 39812 rngccatidALTV 44280 ringccatidALTV 44343 |
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