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Mirrors > Home > MPE Home > Th. List > drngid2 | Structured version Visualization version GIF version |
Description: Properties showing that an element 𝐼 is the identity element of a division ring. (Contributed by Mario Carneiro, 11-Oct-2013.) |
Ref | Expression |
---|---|
drngid2.b | ⊢ 𝐵 = (Base‘𝑅) |
drngid2.t | ⊢ · = (.r‘𝑅) |
drngid2.o | ⊢ 0 = (0g‘𝑅) |
drngid2.u | ⊢ 1 = (1r‘𝑅) |
Ref | Expression |
---|---|
drngid2 | ⊢ (𝑅 ∈ DivRing → ((𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 ∧ (𝐼 · 𝐼) = 𝐼) ↔ 1 = 𝐼)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-3an 1087 | . . . 4 ⊢ ((𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 ∧ (𝐼 · 𝐼) = 𝐼) ↔ ((𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 ) ∧ (𝐼 · 𝐼) = 𝐼)) | |
2 | eldifsn 4717 | . . . . 5 ⊢ (𝐼 ∈ (𝐵 ∖ { 0 }) ↔ (𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 )) | |
3 | 2 | anbi1i 623 | . . . 4 ⊢ ((𝐼 ∈ (𝐵 ∖ { 0 }) ∧ (𝐼 · 𝐼) = 𝐼) ↔ ((𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 ) ∧ (𝐼 · 𝐼) = 𝐼)) |
4 | 1, 3 | bitr4i 277 | . . 3 ⊢ ((𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 ∧ (𝐼 · 𝐼) = 𝐼) ↔ (𝐼 ∈ (𝐵 ∖ { 0 }) ∧ (𝐼 · 𝐼) = 𝐼)) |
5 | drngid2.b | . . . . 5 ⊢ 𝐵 = (Base‘𝑅) | |
6 | drngid2.o | . . . . 5 ⊢ 0 = (0g‘𝑅) | |
7 | eqid 2738 | . . . . 5 ⊢ ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) = ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) | |
8 | 5, 6, 7 | drngmgp 19918 | . . . 4 ⊢ (𝑅 ∈ DivRing → ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) ∈ Grp) |
9 | difss 4062 | . . . . . 6 ⊢ (𝐵 ∖ { 0 }) ⊆ 𝐵 | |
10 | eqid 2738 | . . . . . . . 8 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅) | |
11 | 10, 5 | mgpbas 19641 | . . . . . . 7 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅)) |
12 | 7, 11 | ressbas2 16875 | . . . . . 6 ⊢ ((𝐵 ∖ { 0 }) ⊆ 𝐵 → (𝐵 ∖ { 0 }) = (Base‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })))) |
13 | 9, 12 | ax-mp 5 | . . . . 5 ⊢ (𝐵 ∖ { 0 }) = (Base‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) |
14 | 5 | fvexi 6770 | . . . . . 6 ⊢ 𝐵 ∈ V |
15 | difexg 5246 | . . . . . 6 ⊢ (𝐵 ∈ V → (𝐵 ∖ { 0 }) ∈ V) | |
16 | drngid2.t | . . . . . . . 8 ⊢ · = (.r‘𝑅) | |
17 | 10, 16 | mgpplusg 19639 | . . . . . . 7 ⊢ · = (+g‘(mulGrp‘𝑅)) |
18 | 7, 17 | ressplusg 16926 | . . . . . 6 ⊢ ((𝐵 ∖ { 0 }) ∈ V → · = (+g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })))) |
19 | 14, 15, 18 | mp2b 10 | . . . . 5 ⊢ · = (+g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) |
20 | eqid 2738 | . . . . 5 ⊢ (0g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) = (0g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) | |
21 | 13, 19, 20 | isgrpid2 18531 | . . . 4 ⊢ (((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) ∈ Grp → ((𝐼 ∈ (𝐵 ∖ { 0 }) ∧ (𝐼 · 𝐼) = 𝐼) ↔ (0g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) = 𝐼)) |
22 | 8, 21 | syl 17 | . . 3 ⊢ (𝑅 ∈ DivRing → ((𝐼 ∈ (𝐵 ∖ { 0 }) ∧ (𝐼 · 𝐼) = 𝐼) ↔ (0g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) = 𝐼)) |
23 | 4, 22 | syl5bb 282 | . 2 ⊢ (𝑅 ∈ DivRing → ((𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 ∧ (𝐼 · 𝐼) = 𝐼) ↔ (0g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) = 𝐼)) |
24 | drngid2.u | . . . 4 ⊢ 1 = (1r‘𝑅) | |
25 | 5, 6, 24, 7 | drngid 19920 | . . 3 ⊢ (𝑅 ∈ DivRing → 1 = (0g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })))) |
26 | 25 | eqeq1d 2740 | . 2 ⊢ (𝑅 ∈ DivRing → ( 1 = 𝐼 ↔ (0g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) = 𝐼)) |
27 | 23, 26 | bitr4d 281 | 1 ⊢ (𝑅 ∈ DivRing → ((𝐼 ∈ 𝐵 ∧ 𝐼 ≠ 0 ∧ (𝐼 · 𝐼) = 𝐼) ↔ 1 = 𝐼)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 Vcvv 3422 ∖ cdif 3880 ⊆ wss 3883 {csn 4558 ‘cfv 6418 (class class class)co 7255 Basecbs 16840 ↾s cress 16867 +gcplusg 16888 .rcmulr 16889 0gc0g 17067 Grpcgrp 18492 mulGrpcmgp 19635 1rcur 19652 DivRingcdr 19906 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-tpos 8013 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-3 11967 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-mulr 16902 df-0g 17069 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-grp 18495 df-minusg 18496 df-mgp 19636 df-ur 19653 df-ring 19700 df-oppr 19777 df-dvdsr 19798 df-unit 19799 df-invr 19829 df-dvr 19840 df-drng 19908 |
This theorem is referenced by: erng1r 38936 dvalveclem 38966 |
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