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Mirrors > Home > MPE Home > Th. List > 0subg | Structured version Visualization version GIF version |
Description: The zero subgroup of an arbitrary group. (Contributed by Stefan O'Rear, 10-Dec-2014.) |
Ref | Expression |
---|---|
0subg.z | ⊢ 0 = (0g‘𝐺) |
Ref | Expression |
---|---|
0subg | ⊢ (𝐺 ∈ Grp → { 0 } ∈ (SubGrp‘𝐺)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2758 | . . . 4 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
2 | 0subg.z | . . . 4 ⊢ 0 = (0g‘𝐺) | |
3 | 1, 2 | grpidcl 18198 | . . 3 ⊢ (𝐺 ∈ Grp → 0 ∈ (Base‘𝐺)) |
4 | 3 | snssd 4699 | . 2 ⊢ (𝐺 ∈ Grp → { 0 } ⊆ (Base‘𝐺)) |
5 | 2 | fvexi 6672 | . . . 4 ⊢ 0 ∈ V |
6 | 5 | snnz 4669 | . . 3 ⊢ { 0 } ≠ ∅ |
7 | 6 | a1i 11 | . 2 ⊢ (𝐺 ∈ Grp → { 0 } ≠ ∅) |
8 | eqid 2758 | . . . . . 6 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
9 | 1, 8, 2 | grplid 18200 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 0 ∈ (Base‘𝐺)) → ( 0 (+g‘𝐺) 0 ) = 0 ) |
10 | 3, 9 | mpdan 686 | . . . 4 ⊢ (𝐺 ∈ Grp → ( 0 (+g‘𝐺) 0 ) = 0 ) |
11 | ovex 7183 | . . . . 5 ⊢ ( 0 (+g‘𝐺) 0 ) ∈ V | |
12 | 11 | elsn 4537 | . . . 4 ⊢ (( 0 (+g‘𝐺) 0 ) ∈ { 0 } ↔ ( 0 (+g‘𝐺) 0 ) = 0 ) |
13 | 10, 12 | sylibr 237 | . . 3 ⊢ (𝐺 ∈ Grp → ( 0 (+g‘𝐺) 0 ) ∈ { 0 }) |
14 | eqid 2758 | . . . . 5 ⊢ (invg‘𝐺) = (invg‘𝐺) | |
15 | 2, 14 | grpinvid 18227 | . . . 4 ⊢ (𝐺 ∈ Grp → ((invg‘𝐺)‘ 0 ) = 0 ) |
16 | fvex 6671 | . . . . 5 ⊢ ((invg‘𝐺)‘ 0 ) ∈ V | |
17 | 16 | elsn 4537 | . . . 4 ⊢ (((invg‘𝐺)‘ 0 ) ∈ { 0 } ↔ ((invg‘𝐺)‘ 0 ) = 0 ) |
18 | 15, 17 | sylibr 237 | . . 3 ⊢ (𝐺 ∈ Grp → ((invg‘𝐺)‘ 0 ) ∈ { 0 }) |
19 | oveq1 7157 | . . . . . . . 8 ⊢ (𝑎 = 0 → (𝑎(+g‘𝐺)𝑏) = ( 0 (+g‘𝐺)𝑏)) | |
20 | 19 | eleq1d 2836 | . . . . . . 7 ⊢ (𝑎 = 0 → ((𝑎(+g‘𝐺)𝑏) ∈ { 0 } ↔ ( 0 (+g‘𝐺)𝑏) ∈ { 0 })) |
21 | 20 | ralbidv 3126 | . . . . . 6 ⊢ (𝑎 = 0 → (∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 } ↔ ∀𝑏 ∈ { 0 } ( 0 (+g‘𝐺)𝑏) ∈ { 0 })) |
22 | oveq2 7158 | . . . . . . . 8 ⊢ (𝑏 = 0 → ( 0 (+g‘𝐺)𝑏) = ( 0 (+g‘𝐺) 0 )) | |
23 | 22 | eleq1d 2836 | . . . . . . 7 ⊢ (𝑏 = 0 → (( 0 (+g‘𝐺)𝑏) ∈ { 0 } ↔ ( 0 (+g‘𝐺) 0 ) ∈ { 0 })) |
24 | 5, 23 | ralsn 4576 | . . . . . 6 ⊢ (∀𝑏 ∈ { 0 } ( 0 (+g‘𝐺)𝑏) ∈ { 0 } ↔ ( 0 (+g‘𝐺) 0 ) ∈ { 0 }) |
25 | 21, 24 | bitrdi 290 | . . . . 5 ⊢ (𝑎 = 0 → (∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 } ↔ ( 0 (+g‘𝐺) 0 ) ∈ { 0 })) |
26 | fveq2 6658 | . . . . . 6 ⊢ (𝑎 = 0 → ((invg‘𝐺)‘𝑎) = ((invg‘𝐺)‘ 0 )) | |
27 | 26 | eleq1d 2836 | . . . . 5 ⊢ (𝑎 = 0 → (((invg‘𝐺)‘𝑎) ∈ { 0 } ↔ ((invg‘𝐺)‘ 0 ) ∈ { 0 })) |
28 | 25, 27 | anbi12d 633 | . . . 4 ⊢ (𝑎 = 0 → ((∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 } ∧ ((invg‘𝐺)‘𝑎) ∈ { 0 }) ↔ (( 0 (+g‘𝐺) 0 ) ∈ { 0 } ∧ ((invg‘𝐺)‘ 0 ) ∈ { 0 }))) |
29 | 5, 28 | ralsn 4576 | . . 3 ⊢ (∀𝑎 ∈ { 0 } (∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 } ∧ ((invg‘𝐺)‘𝑎) ∈ { 0 }) ↔ (( 0 (+g‘𝐺) 0 ) ∈ { 0 } ∧ ((invg‘𝐺)‘ 0 ) ∈ { 0 })) |
30 | 13, 18, 29 | sylanbrc 586 | . 2 ⊢ (𝐺 ∈ Grp → ∀𝑎 ∈ { 0 } (∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 } ∧ ((invg‘𝐺)‘𝑎) ∈ { 0 })) |
31 | 1, 8, 14 | issubg2 18361 | . 2 ⊢ (𝐺 ∈ Grp → ({ 0 } ∈ (SubGrp‘𝐺) ↔ ({ 0 } ⊆ (Base‘𝐺) ∧ { 0 } ≠ ∅ ∧ ∀𝑎 ∈ { 0 } (∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 } ∧ ((invg‘𝐺)‘𝑎) ∈ { 0 })))) |
32 | 4, 7, 30, 31 | mpbir3and 1339 | 1 ⊢ (𝐺 ∈ Grp → { 0 } ∈ (SubGrp‘𝐺)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1538 ∈ wcel 2111 ≠ wne 2951 ∀wral 3070 ⊆ wss 3858 ∅c0 4225 {csn 4522 ‘cfv 6335 (class class class)co 7150 Basecbs 16541 +gcplusg 16623 0gc0g 16771 Grpcgrp 18169 invgcminusg 18170 SubGrpcsubg 18340 |
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 2729 ax-sep 5169 ax-nul 5176 ax-pow 5234 ax-pr 5298 ax-un 7459 ax-cnex 10631 ax-resscn 10632 ax-1cn 10633 ax-icn 10634 ax-addcl 10635 ax-addrcl 10636 ax-mulcl 10637 ax-mulrcl 10638 ax-mulcom 10639 ax-addass 10640 ax-mulass 10641 ax-distr 10642 ax-i2m1 10643 ax-1ne0 10644 ax-1rid 10645 ax-rnegex 10646 ax-rrecex 10647 ax-cnre 10648 ax-pre-lttri 10649 ax-pre-lttrn 10650 ax-pre-ltadd 10651 ax-pre-mulgt0 10652 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-nel 3056 df-ral 3075 df-rex 3076 df-reu 3077 df-rmo 3078 df-rab 3079 df-v 3411 df-sbc 3697 df-csb 3806 df-dif 3861 df-un 3863 df-in 3865 df-ss 3875 df-pss 3877 df-nul 4226 df-if 4421 df-pw 4496 df-sn 4523 df-pr 4525 df-tp 4527 df-op 4529 df-uni 4799 df-iun 4885 df-br 5033 df-opab 5095 df-mpt 5113 df-tr 5139 df-id 5430 df-eprel 5435 df-po 5443 df-so 5444 df-fr 5483 df-we 5485 df-xp 5530 df-rel 5531 df-cnv 5532 df-co 5533 df-dm 5534 df-rn 5535 df-res 5536 df-ima 5537 df-pred 6126 df-ord 6172 df-on 6173 df-lim 6174 df-suc 6175 df-iota 6294 df-fun 6337 df-fn 6338 df-f 6339 df-f1 6340 df-fo 6341 df-f1o 6342 df-fv 6343 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-om 7580 df-wrecs 7957 df-recs 8018 df-rdg 8056 df-er 8299 df-en 8528 df-dom 8529 df-sdom 8530 df-pnf 10715 df-mnf 10716 df-xr 10717 df-ltxr 10718 df-le 10719 df-sub 10910 df-neg 10911 df-nn 11675 df-2 11737 df-ndx 16544 df-slot 16545 df-base 16547 df-sets 16548 df-ress 16549 df-plusg 16636 df-0g 16773 df-mgm 17918 df-sgrp 17967 df-mnd 17978 df-grp 18172 df-minusg 18173 df-subg 18343 |
This theorem is referenced by: 0nsg 18388 idressubgsymg 18605 pgp0 18788 slwn0 18807 lsm01 18864 lsm02 18865 dprdz 19220 dprdsn 19226 pgpfac1lem5 19269 tgptsmscls 22850 evpmsubg 30940 |
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