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Mirrors > Home > MPE Home > Th. List > trivsubgsnd | Structured version Visualization version GIF version |
Description: The only subgroup of a trivial group is itself. (Contributed by Rohan Ridenour, 3-Aug-2023.) |
Ref | Expression |
---|---|
trivsubgsnd.1 | ⊢ 𝐵 = (Base‘𝐺) |
trivsubgsnd.2 | ⊢ 0 = (0g‘𝐺) |
trivsubgsnd.3 | ⊢ (𝜑 → 𝐺 ∈ Grp) |
trivsubgsnd.4 | ⊢ (𝜑 → 𝐵 = { 0 }) |
Ref | Expression |
---|---|
trivsubgsnd | ⊢ (𝜑 → (SubGrp‘𝐺) = {𝐵}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | trivsubgsnd.1 | . . . . . 6 ⊢ 𝐵 = (Base‘𝐺) | |
2 | trivsubgsnd.2 | . . . . . 6 ⊢ 0 = (0g‘𝐺) | |
3 | trivsubgsnd.3 | . . . . . . 7 ⊢ (𝜑 → 𝐺 ∈ Grp) | |
4 | 3 | adantr 479 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (SubGrp‘𝐺)) → 𝐺 ∈ Grp) |
5 | trivsubgsnd.4 | . . . . . . 7 ⊢ (𝜑 → 𝐵 = { 0 }) | |
6 | 5 | adantr 479 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (SubGrp‘𝐺)) → 𝐵 = { 0 }) |
7 | simpr 483 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (SubGrp‘𝐺)) → 𝑥 ∈ (SubGrp‘𝐺)) | |
8 | 1, 2, 4, 6, 7 | trivsubgd 19147 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (SubGrp‘𝐺)) → 𝑥 = 𝐵) |
9 | velsn 4649 | . . . . 5 ⊢ (𝑥 ∈ {𝐵} ↔ 𝑥 = 𝐵) | |
10 | 8, 9 | sylibr 233 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (SubGrp‘𝐺)) → 𝑥 ∈ {𝐵}) |
11 | 10 | ex 411 | . . 3 ⊢ (𝜑 → (𝑥 ∈ (SubGrp‘𝐺) → 𝑥 ∈ {𝐵})) |
12 | 11 | ssrdv 3985 | . 2 ⊢ (𝜑 → (SubGrp‘𝐺) ⊆ {𝐵}) |
13 | 1 | subgid 19122 | . . . 4 ⊢ (𝐺 ∈ Grp → 𝐵 ∈ (SubGrp‘𝐺)) |
14 | 3, 13 | syl 17 | . . 3 ⊢ (𝜑 → 𝐵 ∈ (SubGrp‘𝐺)) |
15 | 14 | snssd 4818 | . 2 ⊢ (𝜑 → {𝐵} ⊆ (SubGrp‘𝐺)) |
16 | 12, 15 | eqssd 3997 | 1 ⊢ (𝜑 → (SubGrp‘𝐺) = {𝐵}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 394 = wceq 1534 ∈ wcel 2099 {csn 4633 ‘cfv 6554 Basecbs 17213 0gc0g 17454 Grpcgrp 18928 SubGrpcsubg 19114 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2697 ax-sep 5304 ax-nul 5311 ax-pow 5369 ax-pr 5433 ax-un 7746 ax-cnex 11214 ax-resscn 11215 ax-1cn 11216 ax-icn 11217 ax-addcl 11218 ax-addrcl 11219 ax-mulcl 11220 ax-mulrcl 11221 ax-mulcom 11222 ax-addass 11223 ax-mulass 11224 ax-distr 11225 ax-i2m1 11226 ax-1ne0 11227 ax-1rid 11228 ax-rnegex 11229 ax-rrecex 11230 ax-cnre 11231 ax-pre-lttri 11232 ax-pre-lttrn 11233 ax-pre-ltadd 11234 ax-pre-mulgt0 11235 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2704 df-cleq 2718 df-clel 2803 df-nfc 2878 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3464 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3967 df-nul 4326 df-if 4534 df-pw 4609 df-sn 4634 df-pr 4636 df-op 4640 df-uni 4914 df-iun 5003 df-br 5154 df-opab 5216 df-mpt 5237 df-tr 5271 df-id 5580 df-eprel 5586 df-po 5594 df-so 5595 df-fr 5637 df-we 5639 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-pred 6312 df-ord 6379 df-on 6380 df-lim 6381 df-suc 6382 df-iota 6506 df-fun 6556 df-fn 6557 df-f 6558 df-f1 6559 df-fo 6560 df-f1o 6561 df-fv 6562 df-riota 7380 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7877 df-2nd 8004 df-frecs 8296 df-wrecs 8327 df-recs 8401 df-rdg 8440 df-er 8734 df-en 8975 df-dom 8976 df-sdom 8977 df-pnf 11300 df-mnf 11301 df-xr 11302 df-ltxr 11303 df-le 11304 df-sub 11496 df-neg 11497 df-nn 12265 df-2 12327 df-sets 17166 df-slot 17184 df-ndx 17196 df-base 17214 df-ress 17243 df-plusg 17279 df-0g 17456 df-mgm 18633 df-sgrp 18712 df-mnd 18728 df-grp 18931 df-subg 19117 |
This theorem is referenced by: trivnsgd 19166 |
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