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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 6361 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
2 | cores 6104 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = ( I ∘ 𝐹)) | |
3 | fnrel 6456 | . . . 4 ⊢ (𝐹 Fn 𝐴 → Rel 𝐹) | |
4 | coi2 6118 | . . . 4 ⊢ (Rel 𝐹 → ( I ∘ 𝐹) = 𝐹) | |
5 | 3, 4 | syl 17 | . . 3 ⊢ (𝐹 Fn 𝐴 → ( I ∘ 𝐹) = 𝐹) |
6 | 2, 5 | sylan9eqr 2880 | . 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 3938 I cid 5461 ran crn 5558 ↾ cres 5559 ∘ ccom 5561 Rel wrel 5562 Fn wfn 6352 ⟶wf 6353 |
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 2795 ax-sep 5205 ax-nul 5212 ax-pr 5332 |
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 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-br 5069 df-opab 5131 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-fun 6359 df-fn 6360 df-f 6361 |
This theorem is referenced by: fcof1oinvd 7051 mapen 8683 mapfien 8873 hashfacen 13815 cofulid 17162 setccatid 17346 estrccatid 17384 efmndid 18055 efmndmnd 18056 symggrp 18530 f1omvdco2 18578 symggen 18600 psgnunilem1 18623 gsumval3 19029 gsumzf1o 19034 frgpcyg 20722 f1linds 20971 qtophmeo 22427 motgrp 26331 hoico2 29536 fcoinver 30359 fcobij 30460 symgfcoeu 30728 symgcom 30729 pmtrcnel2 30736 cycpmconjs 30800 subfacp1lem5 32433 ltrncoidN 37266 trlcoat 37861 trlcone 37866 cdlemg47a 37872 cdlemg47 37874 trljco 37878 tgrpgrplem 37887 tendo1mul 37908 tendo0pl 37929 cdlemkid2 38062 cdlemk45 38085 cdlemk53b 38094 erng1r 38133 tendocnv 38159 dvalveclem 38163 dva0g 38165 dvhgrp 38245 dvhlveclem 38246 dvh0g 38249 cdlemn8 38342 dihordlem7b 38353 dihopelvalcpre 38386 mendring 39799 rngccatidALTV 44267 ringccatidALTV 44330 |
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