![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > ringidval | Structured version Visualization version GIF version |
Description: The value of the unity element of a ring. (Contributed by NM, 27-Aug-2011.) (Revised by Mario Carneiro, 27-Dec-2014.) |
Ref | Expression |
---|---|
ringidval.g | ⊢ 𝐺 = (mulGrp‘𝑅) |
ringidval.u | ⊢ 1 = (1r‘𝑅) |
Ref | Expression |
---|---|
ringidval | ⊢ 1 = (0g‘𝐺) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ur 19245 | . . . . 5 ⊢ 1r = (0g ∘ mulGrp) | |
2 | 1 | fveq1i 6646 | . . . 4 ⊢ (1r‘𝑅) = ((0g ∘ mulGrp)‘𝑅) |
3 | fnmgp 19234 | . . . . 5 ⊢ mulGrp Fn V | |
4 | fvco2 6735 | . . . . 5 ⊢ ((mulGrp Fn V ∧ 𝑅 ∈ V) → ((0g ∘ mulGrp)‘𝑅) = (0g‘(mulGrp‘𝑅))) | |
5 | 3, 4 | mpan 689 | . . . 4 ⊢ (𝑅 ∈ V → ((0g ∘ mulGrp)‘𝑅) = (0g‘(mulGrp‘𝑅))) |
6 | 2, 5 | syl5eq 2845 | . . 3 ⊢ (𝑅 ∈ V → (1r‘𝑅) = (0g‘(mulGrp‘𝑅))) |
7 | 0g0 17866 | . . . 4 ⊢ ∅ = (0g‘∅) | |
8 | fvprc 6638 | . . . 4 ⊢ (¬ 𝑅 ∈ V → (1r‘𝑅) = ∅) | |
9 | fvprc 6638 | . . . . 5 ⊢ (¬ 𝑅 ∈ V → (mulGrp‘𝑅) = ∅) | |
10 | 9 | fveq2d 6649 | . . . 4 ⊢ (¬ 𝑅 ∈ V → (0g‘(mulGrp‘𝑅)) = (0g‘∅)) |
11 | 7, 8, 10 | 3eqtr4a 2859 | . . 3 ⊢ (¬ 𝑅 ∈ V → (1r‘𝑅) = (0g‘(mulGrp‘𝑅))) |
12 | 6, 11 | pm2.61i 185 | . 2 ⊢ (1r‘𝑅) = (0g‘(mulGrp‘𝑅)) |
13 | ringidval.u | . 2 ⊢ 1 = (1r‘𝑅) | |
14 | ringidval.g | . . 3 ⊢ 𝐺 = (mulGrp‘𝑅) | |
15 | 14 | fveq2i 6648 | . 2 ⊢ (0g‘𝐺) = (0g‘(mulGrp‘𝑅)) |
16 | 12, 13, 15 | 3eqtr4i 2831 | 1 ⊢ 1 = (0g‘𝐺) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 = wceq 1538 ∈ wcel 2111 Vcvv 3441 ∅c0 4243 ∘ ccom 5523 Fn wfn 6319 ‘cfv 6324 0gc0g 16705 mulGrpcmgp 19232 1rcur 19244 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-fv 6332 df-ov 7138 df-slot 16479 df-base 16481 df-0g 16707 df-mgp 19233 df-ur 19245 |
This theorem is referenced by: dfur2 19247 srgidcl 19261 srgidmlem 19263 issrgid 19266 srgpcomp 19275 srg1expzeq1 19282 srgbinom 19288 ringidcl 19314 ringidmlem 19316 isringid 19319 prds1 19360 oppr1 19380 unitsubm 19416 rngidpropd 19441 dfrhm2 19465 isrhm2d 19476 rhm1 19478 subrgsubm 19541 issubrg3 19556 cnfldexp 20124 expmhm 20160 nn0srg 20161 rge0srg 20162 assamulgscmlem1 20585 mplcoe3 20706 mplcoe5 20708 mplbas2 20710 evlslem1 20754 evlsgsummul 20764 ply1scltm 20910 lply1binomsc 20936 evls1gsummul 20949 evl1gsummul 20984 madetsumid 21066 mat1mhm 21089 scmatmhm 21139 mdet0pr 21197 mdetunilem7 21223 smadiadetlem4 21274 mat2pmatmhm 21338 pm2mpmhm 21425 chfacfscmulgsum 21465 chfacfpmmulgsum 21469 cpmadugsumlemF 21481 efsubm 25143 amgmlem 25575 amgm 25576 wilthlem2 25654 wilthlem3 25655 dchrelbas3 25822 dchrzrh1 25828 dchrmulcl 25833 dchrn0 25834 dchrinvcl 25837 dchrfi 25839 dchrabs 25844 sumdchr2 25854 rpvmasum2 26096 psgnid 30789 cnmsgn0g 30838 altgnsg 30841 freshmansdream 30909 frobrhm 30910 iistmd 31255 isdomn3 40148 mon1psubm 40150 deg1mhm 40151 c0rhm 44536 c0rnghm 44537 amgmwlem 45330 amgmlemALT 45331 |
Copyright terms: Public domain | W3C validator |