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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 6547 | . 2 ⊢ Fun I | |
| 2 | ididg 5821 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝐴 I 𝐴) | |
| 3 | funbrfv 6909 | . 2 ⊢ (Fun I → (𝐴 I 𝐴 → ( I ‘𝐴) = 𝐴)) | |
| 4 | 1, 2, 3 | mpsyl 68 | 1 ⊢ (𝐴 ∈ 𝑉 → ( I ‘𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 ∈ wcel 2141 class class class wbr 5097 I cid 5537 Fun wfun 6509 ‘cfv 6515 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-iota 6471 df-fun 6517 df-fv 6523 |
| This theorem is referenced by: fviss 6938 fvmpti 6968 fvmpt2 6981 fvresi 7151 seqom0g 8420 fodomfi 9249 seqfeq4 14057 fac1 14283 facp1 14284 bcval5 14324 bcn2 14325 ids1 14604 s1val 14605 climshft2 15599 sum2id 15725 sumss 15741 prod2id 15948 fprodfac 15993 strfvi 17216 grpinvfvi 19014 mulgfvi 19105 efgrcl 19745 efgval 19747 frgp0 19790 frgpmhm 19795 vrgpf 19798 vrgpinv 19799 frgpupf 19803 frgpup1 19805 frgpup2 19806 frgpup3lem 19807 frgpnabllem1 19903 frgpnabllem2 19904 rlmsca2 21253 ply1basfvi 22289 ply1plusgfvi 22290 psr1sca2 22299 ply1sca2 22302 indislem 23047 2ndcctbss 23502 1stcelcls 23508 txindislem 23680 iscau3 25327 iscmet3 25342 ovolctb 25539 itg2splitlem 25797 deg1fvi 26132 deg1invg 26153 dgrle 26290 logfac 26653 fnpreimac 32832 ptpconn 35543 dicvscacl 41775 elinlem 44134 brfvid 44223 fvilbd 44225 nregmodelf1o 45551 cjnpoly 47443 tposid 49466 tposidres 49467 |
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