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Mirrors > Home > MPE Home > Th. List > subg0 | Structured version Visualization version GIF version |
Description: A subgroup of a group must have the same identity as the group. (Contributed by Stefan O'Rear, 27-Nov-2014.) (Revised by Mario Carneiro, 30-Apr-2015.) |
Ref | Expression |
---|---|
subg0.h | ⊢ 𝐻 = (𝐺 ↾s 𝑆) |
subg0.i | ⊢ 0 = (0g‘𝐺) |
Ref | Expression |
---|---|
subg0 | ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 0 = (0g‘𝐻)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subg0.h | . . . . 5 ⊢ 𝐻 = (𝐺 ↾s 𝑆) | |
2 | eqid 2823 | . . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
3 | 1, 2 | ressplusg 16614 | . . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (+g‘𝐺) = (+g‘𝐻)) |
4 | 3 | oveqd 7175 | . . 3 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → ((0g‘𝐻)(+g‘𝐺)(0g‘𝐻)) = ((0g‘𝐻)(+g‘𝐻)(0g‘𝐻))) |
5 | 1 | subggrp 18284 | . . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝐻 ∈ Grp) |
6 | eqid 2823 | . . . . . 6 ⊢ (Base‘𝐻) = (Base‘𝐻) | |
7 | eqid 2823 | . . . . . 6 ⊢ (0g‘𝐻) = (0g‘𝐻) | |
8 | 6, 7 | grpidcl 18133 | . . . . 5 ⊢ (𝐻 ∈ Grp → (0g‘𝐻) ∈ (Base‘𝐻)) |
9 | 5, 8 | syl 17 | . . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (0g‘𝐻) ∈ (Base‘𝐻)) |
10 | eqid 2823 | . . . . 5 ⊢ (+g‘𝐻) = (+g‘𝐻) | |
11 | 6, 10, 7 | grplid 18135 | . . . 4 ⊢ ((𝐻 ∈ Grp ∧ (0g‘𝐻) ∈ (Base‘𝐻)) → ((0g‘𝐻)(+g‘𝐻)(0g‘𝐻)) = (0g‘𝐻)) |
12 | 5, 9, 11 | syl2anc 586 | . . 3 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → ((0g‘𝐻)(+g‘𝐻)(0g‘𝐻)) = (0g‘𝐻)) |
13 | 4, 12 | eqtrd 2858 | . 2 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → ((0g‘𝐻)(+g‘𝐺)(0g‘𝐻)) = (0g‘𝐻)) |
14 | subgrcl 18286 | . . 3 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝐺 ∈ Grp) | |
15 | eqid 2823 | . . . . 5 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
16 | 15 | subgss 18282 | . . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝑆 ⊆ (Base‘𝐺)) |
17 | 1 | subgbas 18285 | . . . . 5 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝑆 = (Base‘𝐻)) |
18 | 9, 17 | eleqtrrd 2918 | . . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (0g‘𝐻) ∈ 𝑆) |
19 | 16, 18 | sseldd 3970 | . . 3 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (0g‘𝐻) ∈ (Base‘𝐺)) |
20 | subg0.i | . . . 4 ⊢ 0 = (0g‘𝐺) | |
21 | 15, 2, 20 | grpid 18141 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ (0g‘𝐻) ∈ (Base‘𝐺)) → (((0g‘𝐻)(+g‘𝐺)(0g‘𝐻)) = (0g‘𝐻) ↔ 0 = (0g‘𝐻))) |
22 | 14, 19, 21 | syl2anc 586 | . 2 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (((0g‘𝐻)(+g‘𝐺)(0g‘𝐻)) = (0g‘𝐻) ↔ 0 = (0g‘𝐻))) |
23 | 13, 22 | mpbid 234 | 1 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 0 = (0g‘𝐻)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 = wceq 1537 ∈ wcel 2114 ‘cfv 6357 (class class class)co 7158 Basecbs 16485 ↾s cress 16486 +gcplusg 16567 0gc0g 16715 Grpcgrp 18105 SubGrpcsubg 18275 |
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 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-nn 11641 df-2 11703 df-ndx 16488 df-slot 16489 df-base 16491 df-sets 16492 df-ress 16493 df-plusg 16580 df-0g 16717 df-mgm 17854 df-sgrp 17903 df-mnd 17914 df-grp 18108 df-subg 18278 |
This theorem is referenced by: subginv 18288 subg0cl 18289 subgmulg 18295 subgga 18432 gasubg 18434 sylow2blem2 18748 subgdmdprd 19158 pgpfaclem1 19205 subrg0 19544 subdrgint 19584 abvres 19612 mpl0 20223 gzrngunitlem 20612 frlm0 20900 frlmgsum 20918 subgnm 23244 cphsubrglem 23783 qrng0 26199 suborng 30890 selvval2lem4 39143 pwssplit4 39696 |
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