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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 19246 | . . . . 5 ⊢ 1r = (0g ∘ mulGrp) | |
2 | 1 | fveq1i 6665 | . . . 4 ⊢ (1r‘𝑅) = ((0g ∘ mulGrp)‘𝑅) |
3 | fnmgp 19235 | . . . . 5 ⊢ mulGrp Fn V | |
4 | fvco2 6752 | . . . . 5 ⊢ ((mulGrp Fn V ∧ 𝑅 ∈ V) → ((0g ∘ mulGrp)‘𝑅) = (0g‘(mulGrp‘𝑅))) | |
5 | 3, 4 | mpan 688 | . . . 4 ⊢ (𝑅 ∈ V → ((0g ∘ mulGrp)‘𝑅) = (0g‘(mulGrp‘𝑅))) |
6 | 2, 5 | syl5eq 2868 | . . 3 ⊢ (𝑅 ∈ V → (1r‘𝑅) = (0g‘(mulGrp‘𝑅))) |
7 | 0g0 17868 | . . . 4 ⊢ ∅ = (0g‘∅) | |
8 | fvprc 6657 | . . . 4 ⊢ (¬ 𝑅 ∈ V → (1r‘𝑅) = ∅) | |
9 | fvprc 6657 | . . . . 5 ⊢ (¬ 𝑅 ∈ V → (mulGrp‘𝑅) = ∅) | |
10 | 9 | fveq2d 6668 | . . . 4 ⊢ (¬ 𝑅 ∈ V → (0g‘(mulGrp‘𝑅)) = (0g‘∅)) |
11 | 7, 8, 10 | 3eqtr4a 2882 | . . 3 ⊢ (¬ 𝑅 ∈ V → (1r‘𝑅) = (0g‘(mulGrp‘𝑅))) |
12 | 6, 11 | pm2.61i 184 | . 2 ⊢ (1r‘𝑅) = (0g‘(mulGrp‘𝑅)) |
13 | ringidval.u | . 2 ⊢ 1 = (1r‘𝑅) | |
14 | ringidval.g | . . 3 ⊢ 𝐺 = (mulGrp‘𝑅) | |
15 | 14 | fveq2i 6667 | . 2 ⊢ (0g‘𝐺) = (0g‘(mulGrp‘𝑅)) |
16 | 12, 13, 15 | 3eqtr4i 2854 | 1 ⊢ 1 = (0g‘𝐺) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 = wceq 1533 ∈ wcel 2110 Vcvv 3494 ∅c0 4290 ∘ ccom 5553 Fn wfn 6344 ‘cfv 6349 0gc0g 16707 mulGrpcmgp 19233 1rcur 19245 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-opab 5121 df-mpt 5139 df-id 5454 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-iota 6308 df-fun 6351 df-fn 6352 df-fv 6357 df-ov 7153 df-slot 16481 df-base 16483 df-0g 16709 df-mgp 19234 df-ur 19246 |
This theorem is referenced by: dfur2 19248 srgidcl 19262 srgidmlem 19264 issrgid 19267 srgpcomp 19276 srg1expzeq1 19283 srgbinom 19289 ringidcl 19312 ringidmlem 19314 isringid 19317 prds1 19358 oppr1 19378 unitsubm 19414 rngidpropd 19439 dfrhm2 19463 isrhm2d 19474 rhm1 19476 subrgsubm 19542 issubrg3 19557 assamulgscmlem1 20122 mplcoe3 20241 mplcoe5 20243 mplbas2 20245 evlslem1 20289 evlsgsummul 20299 ply1scltm 20443 lply1binomsc 20469 evls1gsummul 20482 evl1gsummul 20517 cnfldexp 20572 expmhm 20608 nn0srg 20609 rge0srg 20610 madetsumid 21064 mat1mhm 21087 scmatmhm 21137 mdet0pr 21195 mdetunilem7 21221 smadiadetlem4 21272 mat2pmatmhm 21335 pm2mpmhm 21422 chfacfscmulgsum 21462 chfacfpmmulgsum 21466 cpmadugsumlemF 21478 efsubm 25129 amgmlem 25561 amgm 25562 wilthlem2 25640 wilthlem3 25641 dchrelbas3 25808 dchrzrh1 25814 dchrmulcl 25819 dchrn0 25820 dchrinvcl 25823 dchrfi 25825 dchrabs 25830 sumdchr2 25840 rpvmasum2 26082 psgnid 30734 cnmsgn0g 30783 altgnsg 30786 freshmansdream 30854 iistmd 31140 isdomn3 39797 mon1psubm 39799 deg1mhm 39800 c0rhm 44177 c0rnghm 44178 amgmwlem 44897 amgmlemALT 44898 |
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