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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 6547 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
| 2 | cores 6255 | . . 3 ⊢ (ran 𝐹 ⊆ 𝐵 → (( I ↾ 𝐵) ∘ 𝐹) = ( I ∘ 𝐹)) | |
| 3 | fnrel 6644 | . . . 4 ⊢ (𝐹 Fn 𝐴 → Rel 𝐹) | |
| 4 | coi2 6270 | . . . 4 ⊢ (Rel 𝐹 → ( I ∘ 𝐹) = 𝐹) | |
| 5 | 3, 4 | syl 18 | . . 3 ⊢ (𝐹 Fn 𝐴 → ( I ∘ 𝐹) = 𝐹) |
| 6 | 2, 5 | sylan9eqr 2823 | . 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 |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ⊆ wss 3908 I cid 5560 ran crn 5667 ↾ cres 5668 ∘ ccom 5670 Rel wrel 5671 Fn wfn 6538 ⟶wf 6539 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2738 ax-sep 5262 ax-pr 5409 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2745 df-cleq 2758 df-clel 2841 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-fun 6545 df-fn 6546 df-f 6547 |
| This theorem is used by: fcof1oinvd 7302 mapen 9139 mapfien 9378 hashfacen 14511 cofulid 17972 setccatid 18166 estrccatid 18213 efmndid 18972 efmndmnd 18973 symggrp 19495 f1omvdco2 19543 symggen 19565 psgnunilem1 19588 gsumval3 20002 gsumzf1o 20007 frgpcyg 21753 f1linds 22005 qtophmeo 24004 motgrp 28842 hoico2 32139 fcoinver 32979 fcobij 33095 fcobijfs2 33097 symgfcoeu 33426 symgcom 33427 pmtrcnel2 33434 cycpmconjs 33500 subfacp1lem5 35689 ltrncoidN 40935 trlcoat 41530 trlcone 41535 cdlemg47a 41541 cdlemg47 41543 trljco 41547 tgrpgrplem 41556 tendo1mul 41577 tendo0pl 41598 cdlemkid2 41731 cdlemk45 41754 cdlemk53b 41763 erng1r 41802 tendocnv 41828 dvalveclem 41832 dva0g 41834 dvhgrp 41914 dvhlveclem 41915 dvh0g 41918 cdlemn8 42011 dihordlem7b 42022 dihopelvalcpre 42055 aks6d1c6lem5 42977 mendring 43948 rngccatidALTV 49070 ringccatidALTV 49104 |
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