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Mirrors > Home > ILE Home > Th. List > ablressid | GIF version |
Description: A commutative group restricted to its base set is a commutative group. It will usually be the original group exactly, of course, but to show that needs additional conditions such as those in strressid 12580. (Contributed by Jim Kingdon, 5-May-2025.) |
Ref | Expression |
---|---|
ablressid.b | ⊢ 𝐵 = (Base‘𝐺) |
Ref | Expression |
---|---|
ablressid | ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Abel) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqidd 2190 | . . 3 ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) = (𝐺 ↾s 𝐵)) | |
2 | ablressid.b | . . . 4 ⊢ 𝐵 = (Base‘𝐺) | |
3 | 2 | a1i 9 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐵 = (Base‘𝐺)) |
4 | id 19 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Abel) | |
5 | ssidd 3191 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐵 ⊆ 𝐵) | |
6 | 1, 3, 4, 5 | ressbas2d 12577 | . 2 ⊢ (𝐺 ∈ Abel → 𝐵 = (Base‘(𝐺 ↾s 𝐵))) |
7 | eqidd 2190 | . . 3 ⊢ (𝐺 ∈ Abel → (+g‘𝐺) = (+g‘𝐺)) | |
8 | basfn 12569 | . . . . 5 ⊢ Base Fn V | |
9 | elex 2763 | . . . . 5 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ V) | |
10 | funfvex 5551 | . . . . . 6 ⊢ ((Fun Base ∧ 𝐺 ∈ dom Base) → (Base‘𝐺) ∈ V) | |
11 | 10 | funfni 5335 | . . . . 5 ⊢ ((Base Fn V ∧ 𝐺 ∈ V) → (Base‘𝐺) ∈ V) |
12 | 8, 9, 11 | sylancr 414 | . . . 4 ⊢ (𝐺 ∈ Abel → (Base‘𝐺) ∈ V) |
13 | 2, 12 | eqeltrid 2276 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐵 ∈ V) |
14 | 1, 7, 13, 9 | ressplusgd 12637 | . 2 ⊢ (𝐺 ∈ Abel → (+g‘𝐺) = (+g‘(𝐺 ↾s 𝐵))) |
15 | ablgrp 13225 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
16 | 2 | grpressid 13002 | . . 3 ⊢ (𝐺 ∈ Grp → (𝐺 ↾s 𝐵) ∈ Grp) |
17 | 15, 16 | syl 14 | . 2 ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Grp) |
18 | eqid 2189 | . . 3 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
19 | 2, 18 | ablcom 13239 | . 2 ⊢ ((𝐺 ∈ Abel ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥(+g‘𝐺)𝑦) = (𝑦(+g‘𝐺)𝑥)) |
20 | 6, 14, 17, 19 | isabld 13235 | 1 ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Abel) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1364 ∈ wcel 2160 Vcvv 2752 Fn wfn 5230 ‘cfv 5235 (class class class)co 5895 Basecbs 12511 ↾s cress 12512 +gcplusg 12586 Grpcgrp 12942 Abelcabl 13221 |
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 2162 ax-14 2163 ax-ext 2171 ax-coll 4133 ax-sep 4136 ax-pow 4192 ax-pr 4227 ax-un 4451 ax-setind 4554 ax-cnex 7931 ax-resscn 7932 ax-1cn 7933 ax-1re 7934 ax-icn 7935 ax-addcl 7936 ax-addrcl 7937 ax-mulcl 7938 ax-addcom 7940 ax-addass 7942 ax-i2m1 7945 ax-0lt1 7946 ax-0id 7948 ax-rnegex 7949 ax-pre-ltirr 7952 ax-pre-ltadd 7956 |
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 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-nel 2456 df-ral 2473 df-rex 2474 df-reu 2475 df-rmo 2476 df-rab 2477 df-v 2754 df-sbc 2978 df-csb 3073 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-nul 3438 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-int 3860 df-iun 3903 df-br 4019 df-opab 4080 df-mpt 4081 df-id 4311 df-xp 4650 df-rel 4651 df-cnv 4652 df-co 4653 df-dm 4654 df-rn 4655 df-res 4656 df-ima 4657 df-iota 5196 df-fun 5237 df-fn 5238 df-f 5239 df-f1 5240 df-fo 5241 df-f1o 5242 df-fv 5243 df-riota 5851 df-ov 5898 df-oprab 5899 df-mpo 5900 df-pnf 8023 df-mnf 8024 df-ltxr 8026 df-inn 8949 df-2 9007 df-ndx 12514 df-slot 12515 df-base 12517 df-sets 12518 df-iress 12519 df-plusg 12599 df-0g 12760 df-mgm 12829 df-sgrp 12862 df-mnd 12875 df-grp 12945 df-minusg 12946 df-cmn 13222 df-abl 13223 |
This theorem is referenced by: rngressid 13305 |
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