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Mirrors > Home > ILE Home > Th. List > trivsubgd | GIF version |
Description: The only subgroup of a trivial group is itself. (Contributed by Rohan Ridenour, 3-Aug-2023.) |
Ref | Expression |
---|---|
trivsubgd.1 | ⊢ 𝐵 = (Base‘𝐺) |
trivsubgd.2 | ⊢ 0 = (0g‘𝐺) |
trivsubgd.3 | ⊢ (𝜑 → 𝐺 ∈ Grp) |
trivsubgd.4 | ⊢ (𝜑 → 𝐵 = { 0 }) |
trivsubgd.5 | ⊢ (𝜑 → 𝐴 ∈ (SubGrp‘𝐺)) |
Ref | Expression |
---|---|
trivsubgd | ⊢ (𝜑 → 𝐴 = 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | trivsubgd.5 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ (SubGrp‘𝐺)) | |
2 | trivsubgd.1 | . . . . . 6 ⊢ 𝐵 = (Base‘𝐺) | |
3 | 2 | subgss 13065 | . . . . 5 ⊢ (𝐴 ∈ (SubGrp‘𝐺) → 𝐴 ⊆ 𝐵) |
4 | 1, 3 | syl 14 | . . . 4 ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
5 | trivsubgd.4 | . . . 4 ⊢ (𝜑 → 𝐵 = { 0 }) | |
6 | 4, 5 | sseqtrd 3205 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ { 0 }) |
7 | trivsubgd.2 | . . . . . 6 ⊢ 0 = (0g‘𝐺) | |
8 | 7 | subg0cl 13073 | . . . . 5 ⊢ (𝐴 ∈ (SubGrp‘𝐺) → 0 ∈ 𝐴) |
9 | 1, 8 | syl 14 | . . . 4 ⊢ (𝜑 → 0 ∈ 𝐴) |
10 | 9 | snssd 3749 | . . 3 ⊢ (𝜑 → { 0 } ⊆ 𝐴) |
11 | 6, 10 | eqssd 3184 | . 2 ⊢ (𝜑 → 𝐴 = { 0 }) |
12 | 11, 5 | eqtr4d 2223 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1363 ∈ wcel 2158 ⊆ wss 3141 {csn 3604 ‘cfv 5228 Basecbs 12475 0gc0g 12722 Grpcgrp 12898 SubGrpcsubg 13058 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1457 ax-7 1458 ax-gen 1459 ax-ie1 1503 ax-ie2 1504 ax-8 1514 ax-10 1515 ax-11 1516 ax-i12 1517 ax-bndl 1519 ax-4 1520 ax-17 1536 ax-i9 1540 ax-ial 1544 ax-i5r 1545 ax-13 2160 ax-14 2161 ax-ext 2169 ax-sep 4133 ax-pow 4186 ax-pr 4221 ax-un 4445 ax-setind 4548 ax-cnex 7915 ax-resscn 7916 ax-1cn 7917 ax-1re 7918 ax-icn 7919 ax-addcl 7920 ax-addrcl 7921 ax-mulcl 7922 ax-addcom 7924 ax-addass 7926 ax-i2m1 7929 ax-0lt1 7930 ax-0id 7932 ax-rnegex 7933 ax-pre-ltirr 7936 ax-pre-ltadd 7940 |
This theorem depends on definitions: df-bi 117 df-3an 981 df-tru 1366 df-fal 1369 df-nf 1471 df-sb 1773 df-eu 2039 df-mo 2040 df-clab 2174 df-cleq 2180 df-clel 2183 df-nfc 2318 df-ne 2358 df-nel 2453 df-ral 2470 df-rex 2471 df-reu 2472 df-rmo 2473 df-rab 2474 df-v 2751 df-sbc 2975 df-csb 3070 df-dif 3143 df-un 3145 df-in 3147 df-ss 3154 df-nul 3435 df-pw 3589 df-sn 3610 df-pr 3611 df-op 3613 df-uni 3822 df-int 3857 df-br 4016 df-opab 4077 df-mpt 4078 df-id 4305 df-xp 4644 df-rel 4645 df-cnv 4646 df-co 4647 df-dm 4648 df-rn 4649 df-res 4650 df-ima 4651 df-iota 5190 df-fun 5230 df-fn 5231 df-fv 5236 df-riota 5844 df-ov 5891 df-oprab 5892 df-mpo 5893 df-pnf 8007 df-mnf 8008 df-ltxr 8010 df-inn 8933 df-2 8991 df-ndx 12478 df-slot 12479 df-base 12481 df-sets 12482 df-iress 12483 df-plusg 12563 df-0g 12724 df-mgm 12793 df-sgrp 12826 df-mnd 12839 df-grp 12901 df-subg 13061 |
This theorem is referenced by: trivsubgsnd 13092 |
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