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| Mirrors > Home > MPE Home > Th. List > fvi | Structured version Visualization version GIF version | ||
| Description: The value of the identity function. (Contributed by NM, 1-May-2004.) (Revised by Mario Carneiro, 28-Apr-2015.) |
| Ref | Expression |
|---|---|
| fvi | ⊢ (𝐴 ∈ 𝑉 → ( I ‘𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funi 6600 | . 2 ⊢ Fun I | |
| 2 | ididg 5841 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝐴 I 𝐴) | |
| 3 | funbrfv 6964 | . 2 ⊢ (Fun I → (𝐴 I 𝐴 → ( I ‘𝐴) = 𝐴)) | |
| 4 | 1, 2, 3 | mpsyl 69 | 1 ⊢ (𝐴 ∈ 𝑉 → ( I ‘𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 class class class wbr 5108 I cid 5552 Fun wfun 6560 ‘cfv 6566 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-pr 5398 |
| 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-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-iota 6520 df-fun 6568 df-fv 6574 |
| This theorem is used by: fviss 6993 fvmpti 7023 fvmpt2 7036 fvresi 7209 seqom0g 8504 fodomfi 9342 seqfeq4 14234 fac1 14462 facp1 14463 bcval5 14503 bcn2 14504 ids1 14785 s1val 14786 climshft2 15793 sum2id 15918 sumss 15934 prod2id 16139 fprodfac 16184 strfvi 17412 grpinvfvi 19243 mulgfvi 19333 efgrcl 19980 efgval 19982 frgp0 20025 frgpmhm 20030 vrgpf 20033 vrgpinv 20034 frgpupf 20038 frgpup1 20040 frgpup2 20041 frgpup3lem 20042 frgpnabllem1 20138 frgpnabllem2 20139 rlmsca2 21525 ply1basfvi 22613 ply1plusgfvi 22614 psr1sca2 22623 ply1sca2 22626 indislem 23373 2ndcctbss 23829 1stcelcls 23835 txindislem 24007 iscau3 25654 iscmet3 25669 ovolctb 25866 itg2splitlem 26124 deg1fvi 26458 deg1invg 26479 dgrle 26617 logfac 26986 fnpreimac 33362 ptpconn 36206 dicvscacl 42514 elinlem 44859 brfvid 44948 fvilbd 44950 nregmodelf1o 46269 cjnpoly 48212 sqrtnpoly 48216 tposid 50329 tposidres 50330 |
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