Theorem ablressid 14094

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 13374. (Contributed by Jim Kingdon, 5-May-2025.)

Hypothesis

Ref	Expression
ablressid.b	⊢ 𝐵 = (Base‘𝐺)

Assertion

Ref	Expression
ablressid	⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Abel)

Proof of Theorem ablressid

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqidd 2235	. . 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 3263	. . 3 ⊢ (𝐺 ∈ Abel → 𝐵 ⊆ 𝐵)
6	1, 3, 4, 5	ressbas2d 13371	. 2 ⊢ (𝐺 ∈ Abel → 𝐵 = (Base‘(𝐺 ↾s 𝐵)))
7		eqidd 2235	. . 3 ⊢ (𝐺 ∈ Abel → (+g‘𝐺) = (+g‘𝐺))
8		basfn 13361	. . . . 5 ⊢ Base Fn V
9		elex 2827	. . . . 5 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ V)
10		funfvex 5694	. . . . . 6 ⊢ ((Fun Base ∧ 𝐺 ∈ dom Base) → (Base‘𝐺) ∈ V)
11	10	funfni 5465	. . . . 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 2321	. . 3 ⊢ (𝐺 ∈ Abel → 𝐵 ∈ V)
14	1, 7, 13, 9	ressplusgd 13432	. 2 ⊢ (𝐺 ∈ Abel → (+g‘𝐺) = (+g‘(𝐺 ↾s 𝐵)))
15		ablgrp 14048	. . 3 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
16	2	grpressid 13822	. . 3 ⊢ (𝐺 ∈ Grp → (𝐺 ↾s 𝐵) ∈ Grp)
17	15, 16	syl 14	. 2 ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Grp)
18		eqid 2234	. . 3 ⊢ (+g‘𝐺) = (+g‘𝐺)
19	2, 18	ablcom 14062	. 2 ⊢ ((𝐺 ∈ Abel ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥(+g‘𝐺)𝑦) = (𝑦(+g‘𝐺)𝑥))
20	6, 14, 17, 19	isabld 14058	1 ⊢ (𝐺 ∈ Abel → (𝐺 ↾s 𝐵) ∈ Abel)

Syntax hints:   → wi 4   = wceq 1398   ∈ wcel 2205  Vcvv 2815   Fn wfn 5354  ‘cfv 5359  (class class class)co 6060  Basecbs 13302   ↾_s cress 13303  +_gcplusg 13380  Grpcgrp 13761  Abelcabl 14044

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-14 2208  ax-ext 2216  ax-coll 4231  ax-sep 4234  ax-pow 4293  ax-pr 4328  ax-un 4560  ax-setind 4666  ax-cnex 8236  ax-resscn 8237  ax-1cn 8238  ax-1re 8239  ax-icn 8240  ax-addcl 8241  ax-addrcl 8242  ax-mulcl 8243  ax-addcom 8245  ax-addass 8247  ax-i2m1 8250  ax-0lt1 8251  ax-0id 8253  ax-rnegex 8254  ax-pre-ltirr 8257  ax-pre-ltadd 8261

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-pw 3677  df-sn 3701  df-pr 3702  df-op 3704  df-uni 3921  df-int 3956  df-iun 3999  df-br 4116  df-opab 4178  df-mpt 4179  df-id 4420  df-xp 4762  df-rel 4763  df-cnv 4764  df-co 4765  df-dm 4766  df-rn 4767  df-res 4768  df-ima 4769  df-iota 5319  df-fun 5361  df-fn 5362  df-f 5363  df-f1 5364  df-fo 5365  df-f1o 5366  df-fv 5367  df-riota 6013  df-ov 6063  df-oprab 6064  df-mpo 6065  df-pnf 8328  df-mnf 8329  df-ltxr 8331  df-inn 9260  df-2 9318  df-ndx 13305  df-slot 13306  df-base 13308  df-sets 13309  df-iress 13310  df-plusg 13393  df-0g 13561  df-mgm 13625  df-sgrp 13671  df-mnd 13684  df-grp 13764  df-minusg 13765  df-cmn 14045  df-abl 14046

This theorem is referenced by:  rngressid  14199