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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 13247 | . . . . 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 3218 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ { 0 }) |
7 | trivsubgd.2 | . . . . . 6 ⊢ 0 = (0g‘𝐺) | |
8 | 7 | subg0cl 13255 | . . . . 5 ⊢ (𝐴 ∈ (SubGrp‘𝐺) → 0 ∈ 𝐴) |
9 | 1, 8 | syl 14 | . . . 4 ⊢ (𝜑 → 0 ∈ 𝐴) |
10 | 9 | snssd 3764 | . . 3 ⊢ (𝜑 → { 0 } ⊆ 𝐴) |
11 | 6, 10 | eqssd 3197 | . 2 ⊢ (𝜑 → 𝐴 = { 0 }) |
12 | 11, 5 | eqtr4d 2229 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1364 ∈ wcel 2164 ⊆ wss 3154 {csn 3619 ‘cfv 5255 Basecbs 12621 0gc0g 12870 Grpcgrp 13075 SubGrpcsubg 13240 |
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 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-sep 4148 ax-pow 4204 ax-pr 4239 ax-un 4465 ax-setind 4570 ax-cnex 7965 ax-resscn 7966 ax-1cn 7967 ax-1re 7968 ax-icn 7969 ax-addcl 7970 ax-addrcl 7971 ax-mulcl 7972 ax-addcom 7974 ax-addass 7976 ax-i2m1 7979 ax-0lt1 7980 ax-0id 7982 ax-rnegex 7983 ax-pre-ltirr 7986 ax-pre-ltadd 7990 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-nel 2460 df-ral 2477 df-rex 2478 df-reu 2479 df-rmo 2480 df-rab 2481 df-v 2762 df-sbc 2987 df-csb 3082 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-nul 3448 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-int 3872 df-br 4031 df-opab 4092 df-mpt 4093 df-id 4325 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-rn 4671 df-res 4672 df-ima 4673 df-iota 5216 df-fun 5257 df-fn 5258 df-fv 5263 df-riota 5874 df-ov 5922 df-oprab 5923 df-mpo 5924 df-pnf 8058 df-mnf 8059 df-ltxr 8061 df-inn 8985 df-2 9043 df-ndx 12624 df-slot 12625 df-base 12627 df-sets 12628 df-iress 12629 df-plusg 12711 df-0g 12872 df-mgm 12942 df-sgrp 12988 df-mnd 13001 df-grp 13078 df-subg 13243 |
This theorem is referenced by: trivsubgsnd 13274 |
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