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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 13215. (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 2232 | . . 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 3249 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐵 ⊆ 𝐵) | |
| 6 | 1, 3, 4, 5 | ressbas2d 13212 | . 2 ⊢ (𝐺 ∈ Abel → 𝐵 = (Base‘(𝐺 ↾s 𝐵))) |
| 7 | eqidd 2232 | . . 3 ⊢ (𝐺 ∈ Abel → (+g‘𝐺) = (+g‘𝐺)) | |
| 8 | basfn 13202 | . . . . 5 ⊢ Base Fn V | |
| 9 | elex 2815 | . . . . 5 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ V) | |
| 10 | funfvex 5665 | . . . . . 6 ⊢ ((Fun Base ∧ 𝐺 ∈ dom Base) → (Base‘𝐺) ∈ V) | |
| 11 | 10 | funfni 5439 | . . . . 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 2318 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐵 ∈ V) |
| 14 | 1, 7, 13, 9 | ressplusgd 13273 | . 2 ⊢ (𝐺 ∈ Abel → (+g‘𝐺) = (+g‘(𝐺 ↾s 𝐵))) |
| 15 | ablgrp 13937 | . . 3 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
| 16 | 2 | grpressid 13705 | . . 3 ⊢ (𝐺 ∈ Grp → (𝐺 ↾s 𝐵) ∈ Grp) |
| 17 | 15, 16 | syl 14 | . 2 ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Grp) |
| 18 | eqid 2231 | . . 3 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 19 | 2, 18 | ablcom 13951 | . 2 ⊢ ((𝐺 ∈ Abel ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥(+g‘𝐺)𝑦) = (𝑦(+g‘𝐺)𝑥)) |
| 20 | 6, 14, 17, 19 | isabld 13947 | 1 ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Abel) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∈ wcel 2202 Vcvv 2803 Fn wfn 5328 ‘cfv 5333 (class class class)co 6028 Basecbs 13143 ↾s cress 13144 +gcplusg 13221 Grpcgrp 13644 Abelcabl 13933 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-addcom 8175 ax-addass 8177 ax-i2m1 8180 ax-0lt1 8181 ax-0id 8183 ax-rnegex 8184 ax-pre-ltirr 8187 ax-pre-ltadd 8191 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-reu 2518 df-rmo 2519 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-iun 3977 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 df-riota 5981 df-ov 6031 df-oprab 6032 df-mpo 6033 df-pnf 8259 df-mnf 8260 df-ltxr 8262 df-inn 9187 df-2 9245 df-ndx 13146 df-slot 13147 df-base 13149 df-sets 13150 df-iress 13151 df-plusg 13234 df-0g 13402 df-mgm 13500 df-sgrp 13546 df-mnd 13561 df-grp 13647 df-minusg 13648 df-cmn 13934 df-abl 13935 |
| This theorem is referenced by: rngressid 14029 |
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