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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 19252 | . . . . 5 ⊢ 1r = (0g ∘ mulGrp) | |
2 | 1 | fveq1i 6671 | . . . 4 ⊢ (1r‘𝑅) = ((0g ∘ mulGrp)‘𝑅) |
3 | fnmgp 19241 | . . . . 5 ⊢ mulGrp Fn V | |
4 | fvco2 6758 | . . . . 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 17874 | . . . 4 ⊢ ∅ = (0g‘∅) | |
8 | fvprc 6663 | . . . 4 ⊢ (¬ 𝑅 ∈ V → (1r‘𝑅) = ∅) | |
9 | fvprc 6663 | . . . . 5 ⊢ (¬ 𝑅 ∈ V → (mulGrp‘𝑅) = ∅) | |
10 | 9 | fveq2d 6674 | . . . 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 6673 | . 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 1537 ∈ wcel 2114 Vcvv 3494 ∅c0 4291 ∘ ccom 5559 Fn wfn 6350 ‘cfv 6355 0gc0g 16713 mulGrpcmgp 19239 1rcur 19251 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 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 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-fv 6363 df-ov 7159 df-slot 16487 df-base 16489 df-0g 16715 df-mgp 19240 df-ur 19252 |
This theorem is referenced by: dfur2 19254 srgidcl 19268 srgidmlem 19270 issrgid 19273 srgpcomp 19282 srg1expzeq1 19289 srgbinom 19295 ringidcl 19318 ringidmlem 19320 isringid 19323 prds1 19364 oppr1 19384 unitsubm 19420 rngidpropd 19445 dfrhm2 19469 isrhm2d 19480 rhm1 19482 subrgsubm 19548 issubrg3 19563 assamulgscmlem1 20128 mplcoe3 20247 mplcoe5 20249 mplbas2 20251 evlslem1 20295 evlsgsummul 20305 ply1scltm 20449 lply1binomsc 20475 evls1gsummul 20488 evl1gsummul 20523 cnfldexp 20578 expmhm 20614 nn0srg 20615 rge0srg 20616 madetsumid 21070 mat1mhm 21093 scmatmhm 21143 mdet0pr 21201 mdetunilem7 21227 smadiadetlem4 21278 mat2pmatmhm 21341 pm2mpmhm 21428 chfacfscmulgsum 21468 chfacfpmmulgsum 21472 cpmadugsumlemF 21484 efsubm 25135 amgmlem 25567 amgm 25568 wilthlem2 25646 wilthlem3 25647 dchrelbas3 25814 dchrzrh1 25820 dchrmulcl 25825 dchrn0 25826 dchrinvcl 25829 dchrfi 25831 dchrabs 25836 sumdchr2 25846 rpvmasum2 26088 psgnid 30739 cnmsgn0g 30788 altgnsg 30791 freshmansdream 30859 iistmd 31145 isdomn3 39824 mon1psubm 39826 deg1mhm 39827 c0rhm 44203 c0rnghm 44204 amgmwlem 44923 amgmlemALT 44924 |
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