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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 6524 | . 2 ⊢ Fun I | |
| 2 | ididg 5802 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝐴 I 𝐴) | |
| 3 | funbrfv 6882 | . 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 1541 ∈ wcel 2113 class class class wbr 5098 I cid 5518 Fun wfun 6486 ‘cfv 6492 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-iota 6448 df-fun 6494 df-fv 6500 |
| This theorem is referenced by: fviss 6911 fvmpti 6940 fvmpt2 6952 fvresi 7119 seqom0g 8387 fodomfi 9212 fodomfiOLD 9230 seqfeq4 13974 fac1 14200 facp1 14201 bcval5 14241 bcn2 14242 ids1 14521 s1val 14522 climshft2 15505 sum2id 15631 sumss 15647 prod2id 15851 fprodfac 15896 strfvi 17117 grpinvfvi 18912 mulgfvi 19003 efgrcl 19644 efgval 19646 frgp0 19689 frgpmhm 19694 vrgpf 19697 vrgpinv 19698 frgpupf 19702 frgpup1 19704 frgpup2 19705 frgpup3lem 19706 frgpnabllem1 19802 frgpnabllem2 19803 rlmsca2 21151 ply1basfvi 22181 ply1plusgfvi 22182 psr1sca2 22191 ply1sca2 22194 ply1scl0OLD 22233 ply1scl1OLD 22236 indislem 22944 2ndcctbss 23399 1stcelcls 23405 txindislem 23577 iscau3 25234 iscmet3 25249 ovolctb 25447 itg2splitlem 25705 deg1fvi 26046 deg1invg 26067 dgrle 26204 logfac 26566 fnpreimac 32749 ptpconn 35427 dicvscacl 41451 elinlem 43839 brfvid 43928 fvilbd 43930 nregmodelf1o 45256 cjnpoly 47135 tposid 49130 tposidres 49131 |
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