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Mirrors > Home > MPE Home > Th. List > subgid | Structured version Visualization version GIF version |
Description: A group is a subgroup of itself. (Contributed by Mario Carneiro, 7-Dec-2014.) |
Ref | Expression |
---|---|
issubg.b | ⊢ 𝐵 = (Base‘𝐺) |
Ref | Expression |
---|---|
subgid | ⊢ (𝐺 ∈ Grp → 𝐵 ∈ (SubGrp‘𝐺)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . 2 ⊢ (𝐺 ∈ Grp → 𝐺 ∈ Grp) | |
2 | ssidd 3992 | . 2 ⊢ (𝐺 ∈ Grp → 𝐵 ⊆ 𝐵) | |
3 | issubg.b | . . . 4 ⊢ 𝐵 = (Base‘𝐺) | |
4 | 3 | ressid 16561 | . . 3 ⊢ (𝐺 ∈ Grp → (𝐺 ↾s 𝐵) = 𝐺) |
5 | 4, 1 | eqeltrd 2915 | . 2 ⊢ (𝐺 ∈ Grp → (𝐺 ↾s 𝐵) ∈ Grp) |
6 | 3 | issubg 18281 | . 2 ⊢ (𝐵 ∈ (SubGrp‘𝐺) ↔ (𝐺 ∈ Grp ∧ 𝐵 ⊆ 𝐵 ∧ (𝐺 ↾s 𝐵) ∈ Grp)) |
7 | 1, 2, 5, 6 | syl3anbrc 1339 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ∈ (SubGrp‘𝐺)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2114 ⊆ wss 3938 ‘cfv 6357 (class class class)co 7158 Basecbs 16485 ↾s cress 16486 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 |
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 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 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-iota 6316 df-fun 6359 df-fv 6365 df-ov 7161 df-oprab 7162 df-mpo 7163 df-ress 16493 df-subg 18278 |
This theorem is referenced by: trivsubgsnd 18308 nsgid 18324 gaid2 18435 pgpfac1 19204 pgpfac 19208 ablfaclem2 19210 ablfac 19212 qusxpid 30930 |
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